U.S. Air Force Capt. Greg Lepper, a navigator with the 96th Bomb Squadron, checks instruments in a B-52 Stratofortress aircraft while flying over Fort Polk, La., Aug. 21, 2013, during Green Flag-East 2013.
Green Flag-East is designed to train participants for deployment. (DoD photo by Staff Sgt. Jonathan Snyder, U.S. Air Force) Original public domain image from Flickr