Crew Chiefs with the 421st Aircraft Maintenance Unit work on an F35A Lightning II returning to Hill Air Force Base, Utah, July 31, 2019, after a two-month European deployment. The 421st Fighter Squadron participated in several combat exercises with allied and partner nations while deployed. (U.S. Air Force photo by R. Nial Bradshaw)

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Photo by: Ronald Bradshaw |  VIRIN: 190731-F-OD616-0007.JPG