USAFWS: Defensive counter air
Maj. Douglas Murphy, 509th Weapons Squadron KC-135 Stratotanker instructor pilot, prepares to depart Nellis Air Force Base Dec. 14, 2016, to support the U.S. Air Force Weapons School’s defensive counter-air mission. The DCA mission is the final syllabus event in the Weapons School’s advanced integration phase prior to graduation. (U.S. Air Force Photo Susan Garcia)