Airman 1st Class Landon, 62nd Expeditionary Reconnaissance Squadron aircraft specialist, tests an Identification Friend-or-Foe transponder on an MQ-9 Reaper with Gorgon Stare prior to a sortie at Kandahar Airfield, Afghanistan, Dec. 5, 2015. The Reaper is an armed, multi-mission, medium-altitude, long-endurance remotely piloted aircraft that is employed primarily as an intelligence-collection asset and secondarily against dynamic execution targets. (U.S. Air Force photo by Tech. Sgt. Robert Cloys/Released)