Sergeant James J. Cassidy (center), a Philadelphia, Pa., native and platoon sergeant with Ragnarok Company, 2nd Supply Battalion, 2nd Marine Logistics Group, discusses casualty evacuation procedures with his fireteam aboard the Mountain Warfare Training Center in Bridgeport, Calif., Jan. 22, 2014. Knowing and understanding the steps of casualty evacuations is a vital part of operating in especially hazardous environments.