Ammo's knuckle draggers: A badge of honor Published March 3, 2013 By Master Sgt. Jun Kim 455 AEW/PA Bagram Airfield, Afghanistan -- Munitions specialists from the 455th Expeditionary Maintenance Squadron provide the munitions required to safeguard the troops on the ground. These ammo troops from Davis-Monthan AFB, Ariz., take pride in being called "knuckle draggers" and understand the importance of their mission in the AOR.