Emerald Warrior 17
A special missions aviator from the 4th Special Operations Squadron reviews a checklist prior to a flight on an AC-130U Spooky during Emerald Warrior at Hurlburt Field, Fla., March 1, 2017. Emerald Warrior is a U.S. Special Operations Command exercise during which joint special operations forces train to respond to various threats across the spectrum of conflict. (U.S. Air Force photo/Staff Sgt. Cory D. Payne)