Staff Sgt. Michael Sheehan fires a man-portable aircraft survivability trainer, or MAST, at Saylor Creek Range March 13, 2014, at Mountain Home Air Force Base, Idaho. The MAST is used to train aircrews to react to surface to air missiles threats during live training exercises. Members of the 266th Range Squadron play an invaluable role in Gunfighter Flag 14-2 by providing support to U.S. and coalition forces for future deployments. Sheehan is a 266th RANS ground radar operator technician. (U.S. Air Force photo/Tech. Sgt. JT May III)