Detroit Lions head coach Matt Patricia receives a patch from U.S. Air Force Staff Sgt. Justin Engle, 22nd Airlift Squadron, Travis Air Force Base, Calif., after their practice in Napa Valley, Calif., August 7, 2018. The Oakland Raiders invited Travis Airmen to attend camp and were treated to a scrimmage between the Raiders and Lions and a meet and greet autograph session with players and coaches from both teams. (U.S. Air Force photo by Louis Briscese)

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Photo by: Louis Briscese |  VIRIN: 180807-F-LI975-0066.JPG