In this Monday, March 12, 2012 photo, Commander Ian Johnson stands in 

In this Monday, March 12, 2012 photo, Commander Ian Johnson stands in front of the USS Connecticut, a Sea Wolf-class nuclear submarine, during a port call at a U.S. naval base at Yokosuka, south of Tokyo, Japan. The submarine took part in exercises at the North Pole in 2011 to improve the U.S. Navy's operations in the Arctic. To the world's military leaders, the debate over climate change is long over. They are preparing for a new kind of Cold War in the Arctic, anticipating that rising temperatures there will open up a treasure trove of resources, long-dreamed-of sea lanes and a slew of potential conflicts. (AP Photo/Greg Baker)
Associated Press
In this Monday, March 12, 2012 photo, Commander Ian Johnson stands in front of the USS Connecticut, a Sea Wolf-class nuclear submarine, during a port call at a U.S. naval base at Yokosuka, south of Tokyo, Japan. The submarine took part in exercises at the North Pole in 2011 to improve the U.S. Navy's operations in the Arctic. To the world's military leaders, the debate over climate change is long over. They are preparing for a new kind of Cold War in the Arctic, anticipating that rising temperatures there will open up a treasure trove of resources, long-dreamed-of sea lanes and a slew of potential conflicts. (AP Photo/Greg Baker)
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