Tech. Sgt. Stephen Bartorillo, 9th Maintenance Squadron repair and reclamation craftsman, grabs a wrench from a tool box needed to complete phase maintenance on a U-2 Dragon Lady Jan. 3, 2019, at Beale Air Force Base, California. The phase dock team performs minor phase maintenance and major phase maintenance on the U-2. A minor phase happens every 500 flying hours while a major phase happens every 1,000. (U.S. Air Force photo by Senior Airman Tristan D. Viglianco)
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