451 ELRS: Ready, set, retrograde
Tactical vehicles sit on the flightline prior to being transported to an aircraft in support of retrograde operations March 20, 2015, at Kandahar Airfield, Afghanistan. At the height of retrograde in 2014, Airmen assigned to the 451st Expeditionary Logistics Readiness Squadron were responsible for shipping more than 9,000 tons of cargo each month. (U.S. Air Force photo/Staff Sgt. Whitney Amstutz)