U.S. Air Force Airman Matthew Raymer, 633rd Security Forces Squadron entry controller, performs ammo can presses during the emergency services team tryouts at Joint Base Langley-Eustis, Virginia, June 8, 2018. The tryouts last approximately 24 hours and include water confidence, a fitness obstacle course, a 3-mile ruck march, hand-to-hand combat and other combat drills. (U.S. Air Force photo by Senior Airman Derek Seifert)