Court: Obama appointments are unconstitutional

President Barack Obama violated the Constitution when he bypassed the Senate to fill vacancies on a labor relations panel, a federal appeals court panel ruled Friday.

A three-judge panel of the U.S. Court of Appeals for the D.C. Circuit said that Obama did not have the power to make three recess appointments last year to the National Labor Relations Board.

The unanimous decision is an embarrassing setback for the president, who made the appointments after Senate Republicans spent months blocking his choices for an agency they contended was biased in favor of unions.

The ruling also throws into question Obama's recess appointment of Richard Cordray to head the Consumer Financial Protection Bureau. Cordray's appointment, also made under the recess circumstance, has been challenged in a separate case.

Obama claims he acted properly in the case of the NLRB appointments because the Senate was away for the holidays on a 20-day recess. But the three-judge panel ruled that the Senate technically stayed in session when it was gaveled in and out every few days for so-called "pro forma" sessions.

GOP lawmakers used the tactic - as Democrats have in the past as well - to specifically to prevent the president from using his recess power. GOP lawmakers contend the labor board has been too pro-union in its decisions. They had also vigorously opposed the nomination of Cordray.

The Obama administration is expected to appeal the decision to the U.S. Supreme Court, but if it stands, it means hundreds of decisions issued by the board over more than a year are invalid. It also would leave the five-member labor board with just one validly appointed member, effectively shutting it down. The board is allowed to issue decisions only when it has at least three sitting members.

On Jan. 4, 2012, Obama appointed Deputy Labor Secretary Sharon Block, union lawyer Richard Griffin and NLRB counsel Terence Flynn to fill vacancies on the NLRB, giving it a full contingent for the first time in more than a year. Block and Griffin are Democrats, while Flynn is a Republican. Flynn stepped down from the board last year.

Obama also appointed Cordray on the same day.

The court's decision is a victory for Republicans and business groups that have been attacking the labor board for issuing a series of decisions and rules that make it easier for the nation's labor unions to organize new members.

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Mars Rover Celebrates Milestone on Red Planet

It was never supposed to last this long. When the Mars rover Opportunity settled on the Martian surface nine years ago today, mission managers at NASA said they would be pleased if it lasted for 90 days.

Instead, it's been 3,201 days, and still counting. The rover has driven 22.03 miles, mostly at a snail's pace, from one crater to another, stopping for months at a time in the frigid Martian winters. The six motorized wheels, rated to turn 2.5 million times, have lasted 70 million, and are all still working.

"Opportunity is still in very good health, especially considering what it's gone through," said John Callas, manager of NASA's Mars Exploration Rover project. The surface of Mars is a pretty tough place; there can be temperature fluctuations of a hundred degrees each day. That's pretty hard on the hardware."

Video: '7 Minutes of Terror: A Landing on Mars

When Opportunity and its twin rover, Spirit, reached Mars in January 2004, there was a fair bit of sniping that NASA, with all that 90-day talk, was playing down expectations. It escalated when Steve Squyres of Cornell University, the principal investigator for the missions, said things like, "We're on Sol 300 of a 90-Sol mission." (A Sol is a day on Mars, and lasts 24 hours, 39 minutes.) Callas and others have insisted that the prediction was based on engineering, not a nod to public relations.

"There was an expectation that airfall dust would accumulate on the rover, so that its solar panels would be able to gather less electricity," said Callas. "We saw that on Pathfinder," a small rover that landed on Mars in 1997." The cold climate was also expected to be hard on the rovers' batteries, and changes in temperature from night to day would probably pop a circuit or two.

Instead, the temperatures weren't quite as tough as engineers had expected, and the rovers proved tougher. They did become filthy as the red Martian dust settled on them, reducing the sunlight on the solar panels -- but every now and then a healthy gust came along, surprising everyone on Earth by cleaning the ships off.

Click Here for Pictures: Postcards From Mars

Spirit, in hilly territory on the other side of the planet, finally got stuck in crusty soil in 2009, and its radio went silent the next year. But Opportunity, though it's had some close calls, is -- well, you remember those commercials about the Energizer bunny.

So what do you do with an aging rover on a faraway planet? You keep using it. In its first weeks, NASA said Opportunity found chemical proof that there had once been standing water on the surface of Mars -- good news if you're looking for signs that the planet could once have been friendly to life. Since then, it's been sent to other places, with rocks and soil that are probably older, and with clay that may have been left by ancient rivers.

About 20 NASA staff members still work full-time on Opportunity at the Jet Propulsion Laboratory in Pasadena, Calif. Another 60 split their time between Opportunity and other projects, such as the Curiosity rover that landed last August. About 100 scientists, doing research on Mars, pop in and out.

In a few months, Callas said, Opportunity will head to an area nicknamed Cape Tribulation. The clay there could be rich in the minerals suggestive of past life.

They haven't done much to mark the ninth anniversary or the 3,200th Martian day, just a get-together earlier this week during a previously scheduled science conference. After that, Callas said, it was back to work.

"It's like keeping your car going," he said, "without ever having a chance to change the oil."

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Neanderthal cloning? Pure fantasy

A display of a reconstruction of a Neanderthal man and boy at the Museum for Prehistory in Eyzies-de-Tayac, France.

STORY HIGHLIGHTS

• Arthur Caplan: It would be unethical to try and clone a Neanderthal baby


• Caplan: Downsides include a good chance of producing a baby that is seriously deformed


• He says the future belongs to what we can do to genetically engineer and control microbes


• Caplan: Microbes can make clean fuel, suck up carbon dioxide, clean fat out of arteries

Editor's note: Arthur Caplan is the Drs. William F and Virginia Connolly Mitty professor and director of the Division of Bioethics at New York University Langone Medical Center.

(CNN) -- So now we know -- there won't be a Neanderthal moving into your neighborhood.

Despite a lot of frenzied attention to the intentionally provocative suggestion by a renowned Harvard scientist that new genetic technology makes it possible to splice together a complete set of Neanderthal genes, find an adventurous surrogate mother and use cloning to gin up a Neanderthal baby -- it ain't gonna happen anytime soon.

Nor should it. But there are plenty of other things in the works involving genetic engineering that do merit serious ethical discussion at the national and international levels.

Arthur Caplan

Some thought that the Harvard scientist, George Church, was getting ready to put out an ad seeking volunteer surrogate moms to bear a 35,000-year-old, long-extinct Neanderthal baby. Church had to walk his comments back and note that he was just speculating, not incubating.

Still cloning carries so much mystery and Hollywood glamour thanks to movies such as "Jurassic Park," "The Boys From Brazil" and "Never Let Me Go" that a two-day eruption of the pros and cons of making Neanderthals ensued. That was not necessary. It would be unethical to try and clone a Neanderthal baby.

Why? Because there is no obvious reason to do so. There is no pressing need or remarkable benefit to undertaking such a project. At best it might shed some light on the biology and behavior of a distant ancestor. At worst it would be nothing more than the ultimate reality television show exploitation: An "Octomom"-like surrogate raises a caveman child -- tune in next week to see what her new boyfriend thinks when she tells him that there is a tiny addition in her life and he carries a small club and a tiny piece of flint to sleep with him.

The downsides of trying to clone a Neanderthal include a good chance of killing it, producing a baby that is seriously deformed, producing a baby that lacks immunity to infectious diseases and foods that we have gotten used to, an inability to know what environment to create to permit the child to flourish and a complete lack of understanding of what sort of behavior is "normal" or "appropriate" for such a long-extinct cousin hominid of ours.

When weighed against the risks and the harm that most likely would be done, it would take a mighty big guarantee of benefit to justify this cloning experiment. I am willing to venture that the possible benefit will never, ever reach the point where this list of horrible likely downsides could be overcome.

Even justifying trying to resurrect a woolly mammoth, or a mastodon, or the dodo bird or any other extinct animal gets ethically thorny. How many failures would be acceptable to get one viable mastodon? Where would the animal live? What would we feed it? Who would protect it from poachers, gawkers and treasure hunters? It is not so simple to take a long dead species, make enough of them so they don't die of isolation and lack of social stimulation and then find an environment that is close enough and safe enough compared with that which they once roamed.

In any event the most interesting aspects of genetic engineering do not involve making humans or Neanderthals or mammoths. They involve ginning up microbes to do things that we really need doing such as making clean fuel, sucking up carbon dioxide, cleaning fat out of our arteries, giving us a lot more immunity to nasty bacteria and viruses and helping us make plastics and chemicals more efficiently and cheaply.

In trying to make these kinds of microbes, you can kill all you want without fear of ethical condemnation. And if the new bug does not like the environment in which it has to exist to live well, that will be just too darn bad.

The ethical challenge of this kind of synthetic biology is that it can be used by bad guys for bad purposes. Biological weapons can be ginned up and microbes created that only infect people with certain genes that commonly associate with racial or ethnic groups.

Rather than worry about what will happen to real estate values should a new crop of "Flintstones" move in down the street, our public officials, religious groups and ethicists need to get serious about how much regulation the genetic engineering of microbes needs, how can we detect what terrorists might try to use, what sort of controls do we need to prevent accidents and who is going to pay if a bug turns out to cause more harm than good.

We love to think that the key to tomorrow lies in what humanity can be designed or empowered to do. Thus, the fascination with human cloning. In reality, at least for a long time to come, the future belongs to what we can do to design and control microbes. That is admittedly duller, but it is far better to follow a story that is true than one such as Neanderthal cloning that is pure, speculative fantasy.

Follow @CNNOpinion on Twitter.

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The opinions expressed in this commentary are solely those of Arthur Caplan.

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North Korea plans nuclear test aimed at US amid sanctions

SEOUL: North Korea said Thursday it planned to carry out a third nuclear test aimed at its "arch-enemy" the United States in response to tightened UN sanctions, a statement condemned by Washington as "needlessly provocative".

The announcement also prompted a call for restraint from the North's sole major ally China, and a warning from rival South Korea to heed the demands of the international community.

Following a UN Security Council meeting this week, the communist state hurled fresh invective at its US-led foes in a statement from its National Defence Commission, without specifying when the nuclear test might take place.

But it said the test -- which would follow detonations in 2006 and 2009 that were condemned around the world -- would be part of an "upcoming all-out action" that marked a "new phase" in the country's anti-US struggle.

"We do not hide that the various satellites and long-range rockets we will continue to launch, as well as the high-level nuclear test we will proceed with, are aimed at our arch-enemy the United States," the commission said.

"Settling accounts with the US needs to be done with force, not with words," it added in the statement, carried by the official Korean Central News Agency.

Reacting to the missive, White House spokesman Jay Carney said: "North Korea's statement is needlessly provocative." He added a nuclear test would be a significant violation of UN sanctions and would further isolate Pyongyang.

The US Treasury meanwhile imposed sanctions on two Beijing-based North Korean bankers for their role in exporting Pyongyang's weapons technology and equipment, including to Iran.

Also named for sanctions was a Hong Kong-based trading company which the Treasury said facilitates weapons-related shipments on behalf of Pyongyang's "premier arms dealer", the Mining Development Trading Corporation known as KOMID, the Treasury said.

While North Korea did not elaborate on the meaning of "high-level", some experts have predicted that the country's next test might be of a uranium bomb, rather than the plutonium devices it detonated on the two previous occasions.

Such a development would indicate it had mastered the sophisticated technology needed to produce highly enriched uranium (HEU).

"The statement reads like typical North Korean brinkmanship, and we can't definitely say a test is imminent," said Kim Yong-Hyun, professor of North Korea studies at Dongguk University.

"But it's highly possible that it will use HEU for the test when it happens," Kim said.

While declining to name North Korea, China's foreign ministry said "all relevant parties" with a stake in the Korean peninsula should "refrain from action that might escalate the situation in the region."

The North's threat coincided with a visit to Seoul by the US special envoy on North Korea, Glyn Davies, who urged Pyongyang not to go ahead with a third test.

"Whether North Korea tests or not, it's up to North Korea," Davies told reporters after a meeting with his South Korean counterpart, speaking shortly before the North's statement.

"We hope they don't do it, we call on them not to do it. It would be a mistake and a missed opportunity if they were to do it," he said.

South Korea's foreign ministry spokesman voiced deep regret over the test threat and urged Pyongyang to heed the "constant warnings" against further provocative acts.

Much of the North's statement was devoted to condemning Tuesday's announcement by the UN Security Council of expanded sanctions against Pyongyang in response to its long-range rocket launch last month.

"We absolutely refute all the illegal and outlawed resolutions adopted by the Security Council," the commission said.

Tuesday's resolution, proposed by the United States, was adopted unanimously by the 15-nation council, including the North's sole major ally China.

As well as adding a number of North Korea entities and individuals to an existing UN sanctions list, the resolution threatened "significant action" if the North stages a nuclear test.

The UN said Thursday that the international community must put "pressure" on North Korea to stop it carrying out a nuclear weapons test.

"The international community has to bring pressure to bear on the North Koreans," a spokesman for UN leader Ban Ki-moon told reporters.

South Korean defence ministry spokesman Wi Yong-Seop told reporters that Seoul believed the North was capable of conducting a test "any time its leadership decides to do so".

Last month a US think-tank reached a similar conclusion based on satellite photos, suggesting the North had repaired rain damage at its nuclear test site and could conduct a detonation at two weeks' notice.

- AFP/jc

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North Korea makes new threats against U.S.

Kim Jong Un and his military

Kim Jong Un and his military

Kim Jong Un and his military

Kim Jong Un and his military

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Kim Jong Un and his military

Kim Jong Un and his military

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STORY HIGHLIGHTS

• NEW: The U.S. secretary of defense says predicting a North Korean test is difficult


• Pyongyang says it plans a new nuclear test and further long-range rocket launches


• These are part of an "all-out action" targeting the United States, it says


• North Korea is upset by a recent U.N. Security Council resolution, an analyst says

Seoul, South Korea (CNN) -- North Korea said Thursday that it plans to carry out a new nuclear test and more long-range rocket launches, all of which it said are a part of a new phase of confrontation with the United States.

The North's National Defense Commission said the moves would feed into an "upcoming all-out action" that would target the United States, "the sworn enemy of the Korean people."

Carried by the state media, the comments are the latest defiant flourish from the reclusive North Korean regime, whose young leader, Kim Jong Un, has upheld his father's policy of pursuing a military deterrent and shrugging off international pressure.

U.S. Secretary of Defense Leon Panetta said Thursday there are no "outward indications" that North Korea is about to conduct a nuclear test, but he admitted it would be hard to determine that in advance.

"They have the capability, frankly, to conduct these tests in a way that makes it very difficult to determine whether or not they are doing it," he said in a Pentagon press conference.

"We are very concerned with North Korea's continuing provocative behavior," he said, but he added that the United States is "fully prepared" to deal with any provocations.

Read more: U.N. Security Council slams North Korea, expands sanctions

North Korea's statement prompted France and Great Britain to express exasperation with the secretive regime.

Britain's mission to the United Nations called on North Korean leaders to "refrain from further provocation." France said it "deplores" North Korea's statement, telling its leaders that they need not to threaten, but instead to work toward dismantling their nuclear and missile programs.

In addition to Panetta's statement, the United States responded by adding sanctions against more bank officials and a business linked to the regime's nuclear weapons program.

The Treasury Department announcement targets two Beijing-based representatives of Tanchon Commercial Bank and a company -- Leader (Hong Kong) International Trading Limited -- that the U.S. government says shipped machinery and equipment in support of North Korea's nuclear program.

The organizations are "part of the web of banks, front companies and government agencies that support North Korea's continued proliferation activities," said Under Secretary for Terrorism and Financial Intelligence David S. Cohen.

"By continuing to expose these entities, and the individuals who assist them, we degrade North Korea's ability to use the international financial system for its illicit purposes," he said.

North Korea's statement followed a U.N. Security Council resolution approved Tuesday that the United States pushed for, condemning a recent rocket launch by North Korea and expanding existing sanctions.

Read more: North Korea silences doubters, raises fears with rocket launch

The statement "should have been the expected outcome" from the U.N. decision, said Daniel Pinkston, senior analyst for the International Crisis Group covering Northeast Asia.

"I think they are completely outraged and insulted by it," he said.

Read more: N. Korea's launch causes worries about nukes, Iran and the Pacific

North Korea, which often issues bellicose statements in its state media, said Thursday that it rejects all Security Council resolutions concerning it, describing the most recent resolution as "the most dangerous phase of the hostile policy" toward it.

Read more: U.S. official: North Korea likely deceived U.S., allies before launching rocket

Analyst: Threat meant as a deterrence

The threats toward the United States, a constant theme in the North's propaganda, have more to do with deterrence than a desire for full conflict, Pinkston said.

"I don't believe they have the capability, the intention or the will to invade or destroy the United States," he said. "They wish to deter interference from the U.S. or any outside powers."

Read more: North Korea's rocket launches cost $1.3 billion

North Korea's successful rocket launch last month nonetheless changed the strategic calculations for the United States, showing that the North's missile program is advancing despite an array of heavy sanctions imposed on it.

Analysts say it still has a lot of work to do to master the technology necessary to mount a nuclear warhead on a missile or accurately target it.

At the same time, Pyongyang has been hinting for a while that a new nuclear test could be in the cards.

Read more: South Korean officials: North Korean rocket could hit U.S. mainland

Just before the North sent out its latest hostile statement Thursday, a U.S. State Department official was telling reporters in Seoul that Washington hoped Pyongyang wouldn't go ahead.

"We think that that would be a mistake, obviously," said Glyn Davies, the U.S. special envoy on North Korea. "We call on North Korea, as does the entire international community, not to engage in any further provocations."

North Korea has carried out two previous nuclear tests, in 2006 and 2009, both of which were condemned by the United Nations.

Read more: Huge crowds gather in North Korean capital to celebrate rocket launch

Pyongyang didn't say Thursday when exactly it would carry out a third test, but it could happen "at any time," according to Pinkston.

He said it is hard for anybody outside the North Korean nuclear sector to know if the country is technically ready to carry out the test, but that politically, "it seems an appropriate time."

Demands unlikely to sway North

South Korean defense officials said last year that they believed the North was in a position to carry out a new test whenever leaders in Pyongyang gave the green light.

North Korea's nuclear program is "an element of threat to peace not only for Northeast Asia but also for the world," Park Soo-jin, deputy spokeswoman for the South Korean Unification Ministry, said Thursday.

"North Korea should immediately stop its nuclear test and other provocation and should choose a different path by cooperating with the international community," Park said.

That appears unlikely at this stage, though.

After a failed long-range rocket launch in April, North Korea ignored international condemnation and carried out a second attempt last month. That one succeeded in putting a satellite in orbit, Pyongyang's stated objective.

But the launch was widely considered to be a test of ballistic missile technology. And it remains unclear if the satellite, which the North insists is for peaceful purposes, is functional.

Both North Korea's previous nuclear tests took place weeks or months after long-range rocket launches.

Those tests were carried out under the rule Kim Jong Il, the father of the current leader, and the man who channeled huge amounts of money into North Korea's nuclear and missile development programs.

Kim Jong Il died in December 2011 after 17 years in power, during which the North Korean people became increasingly impoverished and malnourished.

Economically, the country relies heavily on trade with its major ally, China.

On Tuesday, China's Foreign Ministry appealed for calm.

Spokesman Hong Lei urged North Korea and the West to "keep calm, remain cautious and refrain from any action that might escalate the situation in the region."

Read more: For the U.N. and North Korea: Game on

CNN's K.J. Kwon reported from Seoul, and Jethro Mullen from Hong Kong. CNN's David Hawley in Seoul contributed to this report.

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Polar air mass keeps icy grip on Northeast

PORTLAND, Maine Polar air settled in earnest over the Northeast after trekking through the Midwest, grinding trains to a halt, bursting pipes and bringing further misery to folks still trying to recover from superstorm Sandy.

The coldest temperatures were expected to continue Thursday, after which conditions should slowly moderate before returning to normal, said John Koch, a meteorologist with the National Weather Service regional headquarters in Bohemia, N.Y. For the most part, temperatures have been around 10 to 15 degrees below normal, with windy conditions making it feel colder, he said.

The Canadian air mass that arrived in the Upper Midwest over the weekend prompted the National Weather Service to issue wind chill warnings across upstate New York and northern New England.

In a storm-damaged neighborhood near the beach on New York City's Staten Island, people who haven't had heat in their homes since the late October storm took refuge in tents set up by aid workers. The tents were equipped with propane heaters, which were barely keeping up with the cold, and workers were providing sleeping bags and blankets for warmth.

The temperature was expected to dip to around 11 degrees before dawn Thursday.

Play Video

Sandy victims left in the cold

Anthony Gambino has been sleeping in one of the tents off and on since Sandy severely damaged his home, CBS News correspondent Elaine Quijano reports. The former mechanic lives on disability.

"Next week they're talking about getting warmer, but let's face it, we're going into February," said Gambino. "February is unpredictable. March is unpredictable. We may get worse. We may get better. Who knows? Right now, we gotta deal with the moment, and the moment is bad."

The University of South Dakota in Vermillion offered a third consecutive night of free hotel rooms to 500 students who had to leave when a water pipe froze over an electrical room and damaged components. The cold also caused circuit problems on the Metro-North railroad serving areas north of New York City, creating rush-hour delays that were resolved by late Wednesday morning.

In northern New Hampshire, a man who crashed his snowmobile while going over a hill on Tuesday and spent a "bitterly cold night" injured and alone on a trail died on Wednesday, the state's Fish and Game Department said. Friends who went looking for John Arsenault, of Shelburne, when he didn't show up for work found him unconscious Wednesday morning, and he died later at a hospital, authorities said.

In Pennsylvania, officials at a park on Lake Erie warned visitors to stay off hollow "ice dunes" forming along the shore because of the danger of frigid water underneath. A ski resort in New Hampshire shut down Wednesday because of unsafe ski conditions: a predicted wind chill of 48 degrees below zero.

In northern Maine, the temperature dipped to as low as 36 below zero Wednesday morning. The weather service was calling for wind chills as low as minus 45.

Keith Pelletier, the owner of Dolly's Restaurant in Frenchville, said his customers were dressed in multiple layers of clothing and keeping their cars running in the parking lot while eating lunch. It was so cold that even the snowmobilers were staying home, he said.

"You take the wind chill at 39 below and take a snowmobile going 50 mph, and you're about double that," he said. "That's pretty cold."

For Anthony Cavallo, the cold was just another in a litany of big and small aggravations that began when superstorm Sandy swept through his Union Beach, N.J., neighborhood and flooded his one-story house with 4 1/2 feet of water.

Still waiting for the go-ahead to rebuild, Cavallo and his family have been living in a trailer they purchased once it became clear they couldn't afford to rent.

Wednesday's frigid temperatures temporarily froze the trailer's pipes, which Cavallo's 14-year-old daughter discovered when she tried to take a shower at 4:30 a.m. Cavallo spent the morning thawing out the pipes and stuffing hay under the trailer to help insulate them.

"Every day it's something, whether it's frozen pipes or getting jerked around for two months by insurance companies," the 48-year-old security system installer said. "I just kind of want to wake up one day and have no surprises."

In New York City, food vendor Bashir Babury contended with bone-numbing cold when he set up his cart selling coffee, bagels and pastries at 3 a.m. Wednesday. On the coldest of days, he wears layers of clothing and cranks up a small propane heater inside his cart.

"I put on two, three socks, I have good boots and two, three jackets," he said. "A hat, gloves, but when I'm working I can't wear gloves."

A little cold air couldn't keep Jo Goodwin, of Bridgewater, N.H., off the slopes at Sugarloaf ski resort in Carrabassett Valley, Maine, where she was skiing Wednesday with her husband and her sister. The snow conditions were great, and there were no lift lines.

To keep warm, she uses a toe warmer, a hand warmer, a face mask, extra underwear and an extra wool sweater. She was told the wind chill was minus 30 midway up the mountain and 50 below zero near the top.

"Sometimes," she said, "it's better not to know."

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Exterminator Charged in Pa. Doctor's Murder

An exterminator named Joseph Smith was arrested and charged today in the strangling and burning death of Philadelphia pediatrician Melissa Ketunuti.

Smith, 36, had been sent to Ketunuti's home on a service call where the two got into "some kind of argument" in Ketunuti's basement on Monday, Capt. James Clark of the Philadelphia police department said this morning.

"At her home they got into an argument. It went terribly wrong. He struck her, and knocked her to the ground," Clark said. "Immediately he jumped on top of her, started strangling her. She passed out, and then he set her body on fire."

Clark said Smith burned the woman's body "to hide evidence like DNA." He said "at some point, he bound her up." The doctor was found with her hands and feet tied behind her back.

The captain said that before today's arrest Smith's record consisted of only "minor traffic offenses."

Philadelphia Police Department/AP Photo

Pa. Doctor Killing: Person of Interest in Custody Watch Video

Philadelphia Doctor's Murder Leaves Police Baffled Watch Video

Police received a call from Ketunuti's dog-walker about the house fire around 12:30 p.m. Monday, and once inside found Ketunuti with her hands and feet bound. They believe Smith hit her and strangled her with a rope, causing her to pass out, and then bound her body and set fire to it in order to destroy evidence, including DNA evidence.

Ketunuti, 35, was fully clothed and police do not believe she was sexually assaulted.

She was a doctor at Children's Hospital of Philadelphia and had lived alone in the Graduate Hospital neighborhood of the city for about three years.

Clark said that homicide detectives scoured the neighborhood for surveillance videos from nearby stores and businesses, and through the video identified the suspect.

Smith was spotted on video getting out of the vehicle and following Ketunuti to her home. The man left her home after an hour and was seen on video circling her home.

Detectives drove to Clark's home in Levittown, Pa., outside of Philadelphia where he lives with a girlfriend and her child, on Wednesday night and brought him back to the Philadelphia police station.

A silver Ford truck was towed from Smith's home, which was the same truck spotted on surveillance video Monday in Ketunuti's neighborhood, sources told ABC News affiliate WPVI.

There, he gave statements that led police to charge him with the murders, Clark said.

Smith will face charges of murder, arson, and abuse of a corpse.

Ketunuti's hospital issued a statement Tuesday that she was "a warm, caring, earnest, bright young woman with her whole future ahead of her," adding that she will be deeply missed.

"[She was] super pleasant, really nice," one neighbor said. "Just super friendly."

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2013 could be 'climate game-changer'

An ice sculpture entitled 'Minimum Monument' by Brazilian artist Nele Azevedo outside Berlin's Concert Hall, September 2, 2009.

STORY HIGHLIGHTS

• The "neglected" risk of climate change seems to be rising to the top of leaders' agendas


• Extreme weather events are costing the global economy billions of dollars each year


• Gas can be an important bridge to a lower carbon future but it's not the answer


• More investment in renewable energy is needed, with fewer risks

Editor's note: Andrew Steer is President and CEO of the World Resources Institute, a think tank that works with governments, businesses and civil society to find sustainable solutions to environmental and development challenges.

(CNN) -- As leaders gather for the World Economic Forum in Davos, signs of economic hope are upon us. The global economy is on the mend. Worldwide, the middle class is expanding by an estimated 100 million per year. And the quality of life for millions in Asia and Africa is growing at an unprecedented pace.

Threats abound, of course. One neglected risk -- climate change -- appears to at last be rising to the top of agendas in business and political circles. When the World Economic Forum recently asked 1,000 leaders from industry, government, academia, and civil society to rank risks over the coming decade for the Global Risks 2013 report, climate change was in the top three. And in his second inaugural address, President Obama identified climate change as a major priority for his Administration.

Andrew Steer

For good reason: last year was the hottest year on record for the continental United States, and records for extreme weather events were broken around the world. We are seeing more droughts, wildfires, and rising seas. The current U.S. drought will wipe out approximately 1% of the U.S. GDP and is on course to be the costliest natural disaster in U.S. history. Damage from Hurricane Sandy will cost another 0.5% of GDP. And a recent study found that the cost of climate change is about $1.2 trillion per year globally, or 1.6% of global GDP.

Shifting to low-carbon energy sources is critical to mitigating climate change's impacts. Today's global energy mix is changing rapidly, but is it heading in the right direction?

Coal is the greatest driver of carbon dioxide emissions from energy, accounting for more than 40% of the total worldwide. Although coal demand is falling in the United States -- with 55 coal-powered plants closed in the past year -- it's growing globally. The World Resources Institute (WRI) recently identified 1,200 proposed new coal plants around the world. And last year, the United States hit a record-high level of coal exports—arguably transferring U.S. emissions abroad.

Meanwhile, shale gas is booming. Production in the United States has increased nearly tenfold since 2005, and China, India, Argentina, and many others have huge potential reserves. This development can be an economic blessing in many regions, and, because carbon emissions of shale gas are roughly half those of coal, it can help us get onto a lower carbon growth path.

However, while gas is an important bridge to a low carbon future—and can be a component of such a future—it can't get us fully to where we need to be. Greenhouse gas emissions in industrial countries need to fall by 80-90% by 2050 to prevent climate change's most disastrous impacts. And there is evidence that gas is crowding out renewables.

Renewable energy -- especially solar and wind power -- are clear winners when it comes to reducing emissions. Unfortunately, despite falling prices, the financial markets remain largely risk-averse. Many investors are less willing to finance renewable power. As a result of this mindset, along with policy uncertainty and the proliferation of low-cost gas, renewable energy investment dropped 11%, to $268 billion, last year.

What do we need to get on track?

Incentivizing renewable energy investment

Currently, more than 100 countries have renewable energy targets, more than 40 developing nations have introduced feed-in tariffs, and countries from Saudi Arabia to South Africa are making big bets on renewables as a growth market. Many countries are also exploring carbon-trading markets, including the EU, South Korea, and Australia. This year, China launched pilot trading projects in five cities and two provinces, with a goal of a national program by 2015.

Removing market barriers

Despite growing demand for renewable energy from many companies, this demand often remains unmet due to numerous regulatory, financial, and psychological barriers in the marketplace.

In an effort to address these, WRI just launched the Green Power Market Development Group in India, bringing together industry, government, and NGOs to build critical support for renewable energy markets. A dozen major companies from a variety of sectors—like Infosys, ACC, Cognizant, IBM, WIPRO, and others— have joined the initiative. This type of government-industry-utility partnership, built upon highly successful models elsewhere, can spur expanded clean energy development. It will be highlighted in Davos this week at meetings of the Green Growth Action Alliance (G2A2).

De-risking investments

For technical, policy, and financial reasons, risks are often higher for renewables than fossil-based energy. Addressing these risks is the big remaining task to bring about the needed energy transformation. Some new funding mechanisms are emerging that can help reduce risk and thus leverage large sums of financing. For example, the Green Climate Fund could, if well-designed, be an important venue to raise funds and drive additional investments from capital markets. Likewise, multi-lateral development banks' recent $175 billion commitment to sustainable transport could help leverage more funds from the private and public sectors.

Some forward-looking companies are seeking to create internal incentives for green investments. For example, companies like Unilever, Johnson & Johnson, and UPS have been taking actions to reduce internal hurdle rates and shift strategic thinking to the longer-term horizons that many green strategies need.

Davos is exactly the type of venue for finding solutions to such issues, which requires leadership and coalition-building from the private and public sectors. For example, the the G2A2, an alliance of CEOs committed to addressing climate and environmental risks, will launch the Green Investment Report with precisely the goal of "unlocking finance for green growth".

Depending on what happens at Davos—and other forums and meetings like it throughout the year—2013 could just be a game-changer.

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The opinions expressed in this commentary are solely those of Andrew Steer.

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Global elite cautiously optimistic as Davos opens

DAVOS: The world's top politicians and business leaders opened their annual Davos meeting on Wednesday, hoping they might finally have seen the back of a crippling global economic crisis.

Kicking off a four-day extravaganza in the picturesque Swiss ski resort, the head of the International Monetary Fund, Christine Lagarde, noted there had been "some respite and some stabilisation" on the financial markets recently.

"The short-term pressures might have alleviated, but the longer-term pressures are still with us," she added.

While the 2012 meeting was dominated by the eurozone debt crisis and fears Greece could be forced out of the bloc, this year's gathering appeared to be marked by a feeling the global economy might be turning the corner.

"I feel the circumstances in which I'm addressing you today are very different than 12 months ago," said Italian Prime Minister Mario Monti as he delivered the opening speech.

And Axel Weber, the head of Swiss banking giant UBS and former head of the German central bank, said: "The economy has turned, most of the markets have picked up... the major economies are recovering."

Nevertheless, Weber warned that the recovery was "slow and muted" and warned: "In particular, one dimension is missing. Jobs are lost and are not coming back quickly."

The first world leader to address the forum, Russian Prime Minister Dmitry Medvedev, was also in bullish mood, telling the assembled elite that his country grew 3.5 per cent last year and aimed for five per cent growth annually.

But with the sunnier mood came also warnings that the three-year eurozone debt woes could resurface if regulators in particular did not learn the lessons of previous financial crises.

"If we do everything right, we will get out of this. If we don't, this could last another 10 years," said Jamie Dimon, chief executive of JP Morgan Chase.

Events elsewhere often hijack the agenda at the World Economic Forum in Davos and this year was no different, with British Prime Minister David Cameron's vow to hold a referendum on EU membership by 2017 setting tongues wagging.

To applause from the assembled elite, Monti said: "I am confident that if there is to be a referendum, the UK citizens will decide to stay in the EU and contribute to shape its future."

"I think the EU does not need unwilling Europeans. We desperately need willing Europeans," he said.

Leading British business boss Martin Sorrell, chief executive of advertising WPP, complained that the referendum pledge was "at best neutral and at worst negative."

"You just added another reason why people are going to postpone investment decisions and the last thing we need is people postponing more," said Sorrell.

Cameron himself was due to address the forum on Thursday, along with EU powerbroker Angela Merkel, Germany's chancellor.

The conflict in Mali and the crisis in Syria were also poised to exercise the minds of the global elite.

Jordan's King Abdullah II was due to make a special address and the premiers of Egypt, Lebanon, Libya, Tunisia and the Palestinian Territories were scheduled to attend, as well as Israeli President Shimon Peres.

There is also a heavy African presence, with the leaders of South Africa and Nigeria attending a session on "de-risking" the continent on Wednesday.

Despite the presence of so many world leaders, no formal decisions are taken at Davos, although corporate deals are often sewn up on the sidelines and presidents and prime ministers huddle in small gatherings to thrash out pressing issues.

The invitation-only meeting is also known for its informal luncheons and lavish cocktail parties, often hosted by corporate sponsors and with exclusive guest lists, where political and business leaders can network and mingle.

For its annual invasion from the world's most powerful people, the snow-covered resort goes into lockdown, with around 5,000 police and military guarding the venue and helicopters buzzing overhead.

- AFP/jc

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