Coast Guard Aviation Survival Technician 2nd Class Nick Gardner instructs a group of University of Southern California medical students on water survival procedures, April 7, 2015. The Coast Guard Cutter Halibut crew and an aircrew from Coast Guard Air Station Los Angeles conducted rescue swimmer and hoist training as part of a demonstration for University of Southern California medical students learning about the effects of hypothermia on the body. (U.S. Coast Guard photograph by Petty Officer 1st Class Adam Eggers)