Airman 1st Class Zachariah Grube rolls an empty string of 30mm casings after connecting unused rounds with a fresh string at the M4 pad in the Army Ammunition Supply point here, Sept. 15, 2009. Using the a GFU-7 control board and a GFU-8 ammunition loading assembly, Airmen link left-over 30mm rounds with a new string. Airman Grube is a munitions crew member with the 451st Expeditionary Maintenance Squadron deployed from Davis-Monthan Air Force Base, Ariz. and hails from Diamond, Mo. (U.S. Air Force photo/Senior Airman Timothy Taylor)