U.S. Air Force members from the 21st Special Tactics Squadron set up a medical tent during Emerald Warrior 2015 at Marianna Airport, Fla., April 29, 2015. Emerald Warrior is the Department of Defense's only irregular warfare exercise, allowing joint and combined partners to train together and prepare for real world contingency operations. (U.S. Air Force photo by Senior Airman Keith James/Released)