U.S. Air Force Senior Airman Eric Purnell, 823d Base Defense Squadron fireteam member, rests during a waiting period, April 13, 2016, at Avon Park Air Force Range, Fla. Airmen took any opportunity to rest in the shade and take a quick nap before moving to the next challenge. (U.S. Air Force photo by Airman 1st Class Janiqua P. Robinson/Released)