U.S. Air Force Senior Airman Michael Pope, 140th Maintenance Squadron, Colorado Air National Guard, shows the pilot in an F-16 Fighting Falcon fighter jet from the 120th Fighter Squadron at Buckley Air Force Base, Colo., that a safety tag has been removed before a training mission at Red Flag 14-1, at Nellis Air Force Base, Nev., Jan. 31, 2014. Combat units come together from the United States and its allied countries to engage in realistic combat training scenarios within Nellis’ 2.9 million acre Test and Training Range Complex. (U.S. Air National Guard photo/Tech. Sgt. Wolfram M. Stumpf)