U.S. Air Force Airman 1st Class Aric Abing and Airman 1st Class Christopher Williamson listen to instructor Tech Sgt. Jacob Trevino 363rd Training Squadron, Remote Piloted Aircraft Armament course as he explains the correct tie wiring technique to keep bolts from loosening on the MQ-9 Drone aircraft on June 26, 2013, at Sheppard Air Force Base, Texas. (U.S. Air Force photo by Frank Carter/Released)
Frank Carter
Taken on 26 June 2013
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