Tech. Sgt. Joseph Munis, 301st Fighter Wing, Naval Air Station Fort Worth Joint Reserve Base, Texas, builds GBU-31 bombs April 26 at Hill Air Force Base, Utah. Munis, other Airmen and aircraft were at Hill participating in Combat Hammer, an air-to-ground weapons evaluation exercise which collects and analyzes data on the performance of precision weapons and measures their suitability for use in combat. The Air Force supply chain is complex, playing a critical role in the management of Air Force depot-level repairable and consumable spares across the globe in support of a wide range of weapon systems. (U.S. Air Force/Paul Holcomb)