260611-F-KQ059-1162
U.S. Air Force Senior Airman Christopher Velasquez, right, an aerospace physiology technician assigned to the 316th Operational Support Squadron, checks a students maks, during a decompression sickness exercise at Joint Base Andrews, Maryland, June 11, 2026. Decompression sickness is a condition caused by a rapid decrease in the air or water pressure. (U.S. Air Force photo by Senior Airman Daniel Walderbach)