U.S. Air Force Reserve Staff Sgt. Corey Malone, maintenance management production technician, 913th Maintenance Squadron, throws a simulated grenade during the Marine Corps Combat Fitness Test (CFT) Competition Nov. 22, 2017, at Little Rock Air Force Base, Ark. Malone was participating in the third and most difficult part of the CFT, which simulates maneuvering under fire. This event included a high and low crawl, evading obstacles, a causality evacuation, ammo can carry and simulating a stretcher carry, all while being timed. (U.S. Air Force photo by Capt. Casey Staheli/Released)