University of Southern California medical students aboard the Coast Guard Cutter Halibut watch a rescue swimmer demonstration by a Coast Guard HH-65D Dolphin helicopter aircrew from Coast Guard Air Station Los Angeles, April 7, 2015. The students teamed with the Coast Guard units to learn more about water survival and the affects of hypothermia on the body. (U.S. Coast Guard photo by Petty Officer 1st Class Adam Eggers)