A polar bear investigates the submarine top of USS Connecticut during a Navy ice exercise near Prudhoe Bay off the northern coast of Alaska on April 27, 2003 in this photographic handout. James Watkins, chairman of a presidential oceans commission, traveled abaoard the sub to find out more about research on climate change from a Navy ice station for Artic research, from where the photo was taken. (AP Photo/U.S. Navy, HO)