U.S. Air Force Lt. Col. Tate Whitener, a 340th Expeditionary Air Refueling Squadron KC-135 Stratotanker pilot, prepares for takeoff at Al Udeid Air Base, Qatar, Jan. 3. (U.S. Air Force photo by Staff Sgt. Matthew B. Fredericks)
U.S. soldiers gather near a destroyed vehicle as their wounded comrades are airlifted by a medevac helicopter on Aug. 23, 2011. (Johannes Eisele/AFP/Getty Images)
Nigerien soldiers receive a counter-IED class as part of Exercise Flintlock 2017 in Diffa, Niger, Feb. 28, 2017. (U.S. Army photo by Staff Sgt. Kulani Lakanaria)