KADENA AIR BASE, Japan-- Airmen 1st Class Johnathan Meyer (left) and Gilbert Hardy challenge Senior Airman Charles Johnson during a base exercise here on Aug. 24, 2007. Both airmen took the selective arms course which enables them to protect their squadron's personnel and assets. The base conducted a three-day base exercise to demonstrate its ability to deploy and generate aircraft. All three Airmen are assigned to the 18th Civil Engineer Squadron. (U.S. Air Force Photo/Senior Airman Darnell T. Cannady)