Staff Sgt. Samuel Percy and Airman Morgan Matteson, both from the 455th Expeditionary Maintenance Squadron munitions flight, assemble a GBU-54 500 pound bomb at Bagram Airfield, Afghanistan, Nov. 17, 2015. The AMMO flight provides necessary weapons and countermeasures required to project combat airpower. (U.S. Air Force photo/Tech. Sgt. Nicholas Rau)