Four A-10C Thunderbolt IIs from the 354th Fighter Squadron, Davis-Monthan Air Force Base, Ariz., sit on the flightline at Holloman Air Force Base, N.M., after a training flight at White Sands Missile Range, N.M., Dec. 3, 2014. The austere conditions of the missile range allow for pilots to get a close simulation of a deployed environment. (U.S. Air Force photo by Airman 1st Class Chris Massey/Released)