Senior Airman Brian Tripp
U.S. Air Force Senior Airman Brian Tripp, 51st Civil Engineer Squadron emergency management journeyman, shows a noncombatant evacuee how to properly don a gas mask during Exercise Courageous Channel 2017 at Osan Air Base, Republic of Korea, Oct. 24, 2017. A Noncombatant Evacuation Operations exercise was held from Oct. 24-27 It provided more than 1,700 members from the base an opportunity to learn and understand the evacuation process to be better prepared in the event of an actual evacuation order.
(U.S. Air Force photo by Staff Sgt. Franklin R. Ramos/Released)