U.S. Air Force Tech. Sgt. Rosa Valdes and U.S. Air Force Staff Sgt. Rebecca Toland, both non-destructive inspection technicians from the 140th Maintenance Squadron, Colorado Air National Guard, located at Buckley Air Force Base, Aurora, Colorado, perform an inspection of the 446 bulkhead on a block-30 F-16 Fighting Falcon aircraft Sept. 12, 2019. The 446 bulkhead is the aft fuselage structure of the F-16 that supports the tail structure and recent tests have indicated an increased amount of stress cracks in this area.(U.S. Air National Guard photo by Senior Master Sgt. John Rohrer)

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Photo by: Senion Master Sgt. John Rohrer |  VIRIN: 190912-Z-QD622-1028.JPG