Arctic Ice Cap

Exclusive look inside the U.S. Navy's polar environment submariner exercise.

Under the Ice in the Arctic

Arctic Ice  Cap
Arctic Ice  Cap
Arctic Ice  Cap
Arctic Ice  Cap
Arctic Ice  Cap
Arctic Ice  Cap
Arctic Ice  Cap
Arctic Ice  Cap
Arctic Ice Cap
Arctic Ice Cap
The sun sets over the Arctic. Every two years the Navy comes here, but the mission is becoming more critical because of climate change. The ice is thinning and receding, which could open up waterways and provide access to the seabed, which may contain one quarter of the world's undiscovered oil. A number of countries are making competing claims, and the Navy wants to protect U.S. national interests. (David Kerley/ABC News)
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