A U.S. Air Force crew chief assigned to the 93rd Fighter Squadron, Homestead Air Reserve Base, Fla., salutes his pilot May 5, 2015, prior to take off during RED FLAG-Alaska (RF-A) 15-2 at Eielson Air Force Base, Alaska. RF-A is a Pacific Air Forces-directed field training exercise for U.S. and allied forces to train in simulated air-combat situations. (U.S. Air Force photo by Tech. Sgt. Miguel Lara III/Released)