Airman 1st Class Joseph Campbell shoots his M-16 A2 during weapons qualification training at the Naval Weapons Station Charleston, S.C., on Nov. 16, 2009. Students must complete the weapons qualification training and learn how to handle, maintain and clean their weapons during the Charleston Air Force Base, base-level Expeditionary Combat Skills Training Course. Airman Campbell is a customer service specialist with the 437th Logistics Readiness Squadron. (U.S. Air Force Photo/Senior Airman Katie Gieratz)

Airman 1st Class Chris McMillan listens to an expeditionary combat skills training instructor on Charleston Air Force Base, S.C., on Nov. 17, 2009, during training in a base-lever ECST course. There are 26 classes that Airmen go through during ECST. Airman Mcmillan is a life support technician with the 437th Operations Support Squadron at Charleston AFB. (U.S. Air Force Photo/Senior Airman Katie Gieratz)

Tech. Sgt. Nonglaks Dyer responds to opposing forces during base-level Expeditionary Combat Skills Training at Charleston Air Force Base, S.C., on Nov. 17, 2009. There are typically 40 students in each class with a maximum of 55. Sergeant Dyer is a cargo documentation NCO in charge with the 437th Aerial Port Squadron. (U.S. Air Force Photo/Senior Airman Katie Gieratz)

Staff Sgt. Vincent Barnes and Senior Airman Michael Rodriquez finish up the 50 meter high crawl and low crawl course during base-level Expeditionary Combat Skills Training at Charleston Air Force Base, S.C., on Nov. 17, 2009. The high crawl and low crawl teaches individuals how to move while under fire. Airman Rodriquez is a special handling journeyman and Sergeant Barnes is a ramp services specialist, both are with the 437th Aerial Port Squadron.(U.S. Air Force Photo/Senior Airman Katie Gieratz)