Master Sgt. Lee Boston, 621st Contingency Response Group contingency location team lead, tests a new virtual reality system during exercise Mobility Guardian 2021 at Alpena Combat Readiness Training Center, Alpena, Mich., May 17, 2021. Mobility Guardian 2021 includes Air Mobility Command’s first large-scale training on Agile Combat Employment and Advanced Battle Management System through the use of tactical data links. (U.S. Air Force photo by Senior Airman Lawrence Sena)
70.0-200.0 mm f/2.8
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