Airman 1st Class Blade Dirickson, a crew chief assigned to the 301st Fighter Wing, Naval Air Station Fort Worth Joint Reserve Base, Texas, performs F-16 Fighting Falcon pre-flight maintenance checks May 3 at Hill AFB, Utah. Airmen and aircraft from several bases participated in Combat Hammer, a two-week long exercise which evaluates precision-guided air-to-ground weapons for reliability, maintainability, suitability and accuracy. (U.S. Air Force/R. Nial Bradshaw)