https://www.upi.com/News_Photos/lp/05b8e83e8abf1cb6c24bce403a29f182/
https://www.upi.com/News_Photos/view/upi/05b8e83e8abf1cb6c24bce403a29f182/US-submarine-breaks-through-feet-of-ice-in-Arctic-Ocean/
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UPI
UPI
https://cdnph.upi.com/pv/upi/05b8e83e8abf1cb6c24bce403a29f182/Arctic-Ocean-submarine-exercise.jpg
U.S. submarine breaks through feet of ice in Arctic Ocean
The Los Angeles-class submarine USS Annapolis is seen on the surface of the Arctic Ocean after breaking through three feet of ice during a training exercise on March 21, 2009. (UPI Photo/Tiffini M. Jones/U.S. Navy)