U.S. Air Force ramp specialist assigned to the 455th Expeditionary Aerial Port Squadron monitor loading procedures as a Persistent Threat Detection System Mobile Mooring Trailer is backed onto a C-17 Globemaster III Aug. 26, 2015 at Bagram Air Field, Afghanistan. The team uses wooden blocks to bridge the gap between the ground and the rail in order to properly back onto the aircraft. (U.S. Air Force photo by Master Sgt. Cohen A. Young/Released)