U.S. Air Force Staff Sgt. Kenneth Kirven, 388th Munitions Squadron precision guided munitions crew chief, prepares a GBU/39B for a training exercise held at Hill Air Force Base, Utah, July 8, 2021. The GBU/39B is an extended range all-weather, day or night 250-pound class, guided munition, which relies on the Global Positioning System to provide navigation to the target. (U.S. Air Force photo by Staff Sgt. Codie Trimble)

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Photo by: Staff Sgt. Codie Trimble |  VIRIN: 210708-F-PG806-1042.JPG