Environment

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This undated photo provided by Kristin Laidre shows a pod of narwhals swimming off the coast of northern Canada. They thrive in ice-choked seas where humans can rarely venture. Biologist Kristin Laidre and her colleagues at the Polar Science Center at the UW's Applied Physics Laboratory have tagged three of the creatures with satellite transmitters that track the animals' movements and measure water temperatures in a region where researchers believe rapid warming is taking place. (AP Photo/APL/University of Washington, Kristin Laidre) ** NO SALES **

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Former Republican presidential contender Mitt Romney met with donors Friday, which was seen as a signal that he's ready to compete for the big donors and the key fundraisers who power the establishment wing of the GOP. (Associated Press)

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HAZARDOUS: Fort McClellan in Alabama was the site of the only military facility in the U.S. to use live chemical weapons such as sulfur mustard and nerve agents. (Associated Press)

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Bruce Willis is selling his Sun Valley ski estate, built in 1984 on Flying Heart Lake in Hailey, Idaho, for $7 million. (Associated Press)

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U.S. Housing and Urban Development Secretary Julian Castro (left) announces that nearly $60 million in grants have been awarded to tribal communities across the nation during a news conference Oct. 6 in Anchorage, Alaska. Sen. Mark Begich, Alaska Democrat, listens at right. (Associated Press)

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This June 26, 2007 file photo shows a sign depicting U.S. Forest mascot Smokey Bear on a fire danger sign in South Lake Tahoe, Calif., as smoke from a wildfire rises behind it. (AP Photo/Ben Margot, File)

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Former Alaska Gov. Sarah Palin is one of many Republicans slated to attend the inaugural Iowa Freedom Summit later this month in Des Moines. (Associated Press)

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Shoppers look at the windows of a leather goods shop in central Athens. The deep recession has devastated Greece's commercial sector.

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California Gov. Jerry Brown (center) is greeted by lawmakers on the floor of the Assembly Chambers before his inauguration at the state Capitol Monday. He laid out ambitious 2030 goals for combating global warming, led by a 50 percent drop in petroleum use by cars and trucks. (Associated Press)

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White House press secretary Josh Earnest said President Obama would reject the Keystone and Obamacare bills if they reach his desk and blamed Republican leaders for forcing early showdowns with the president. (Associated Press)

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"The aluminum is supposed to act like a heat barrier, keeping the fighter's body heat from being detected by the drone camera system," says an analysis by the Middle East Media Research Institute. (Middle East Media Research Institute)

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Ken Ham and his group, Answers in Genesis, posted an animated 15-second digital billboard in New York's Times Square for the New Year's Eve celebrations. (answersingenesis.org)

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FILE - This Tuesday, Dec. 9, 2014, file photo shows an Indian woman from Ecuador posing for a photo at the Climate Change Conference in Lima, Peru. Low oil prices could paradoxically help the world reach an international agreement to fight global warming, Laurence Tubiana, France’s special representative for the 2015 climate conference in Paris said, laying out plans for a binding accord to stem greenhouse gas emissions. Her government will spend 11 months trying to cajole more than 190 countries into overcoming disagreements about acceptable greenhouse gas emissions and who should pay for them, and locking themselves into an accord. (AP Photo/Juan Karita, File)

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Each inch of ice thickness for the erstwhile outdoor hockey rink requires about 10,000 gallons of water just to keep the surface playable for the opposing teams. (Associated Press)

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Nevada rancher Cliven Bundy continues to pasture his cattle on federal lands eight months after an armed standoff with authorities. (Associated Press)

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Chicago Bears President and CEO Ted Phillips, left, and Chairman George H. McCaskey listen to question at a news conference at Halas Hall on Monday, Dec. 29, 2014, in Lake Forest, Ill. Chicago Bears head coach Marc Trestman and general manager Phil Emery were fired Monday after the team completed a disappointing 5-11 campaign.(AP Photo/Nam Y. Huh)

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Chicago Bears defensive tackle Stephen Paea talks to media about Bears fired general manager Phil Emery and head coach Marc Trestman at Halas Hall on Monday, Dec. 29, 2014, in Lake Forest, Ill. Chicago Bears head coach Marc Trestman and general manager Phil Emery were fired Monday after the team completed a disappointing 5-11 campaign.(AP Photo/Nam Y. Huh)

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The annual New Year's Eve "Possum Drop" in a small North Carolina town will go on as planned without a live opossum this year following a lawsuit from People for the Ethical Treatment of Animals.

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National Edition News cover for December 29, 2014 - Bridgegate to nowhere for Christie hopes: New Jersey Gov. Chris Christie answers a question about the lane closures near the George Washington Bridge on Friday, March 28, 2014, in Trenton, N.J. Christie spoke Friday in his first news conference in nearly three months. (AP Photo/Mel Evans)