Air Force Reserve Lt. Col. Matthew Griffin, 339th Flight Test Squadron F-15 pilot and director of operations, conducts and oxygen mask test during aircraft launch preparation March 26, 2020, at Robins Air Force Base, Georgia. Active-duty and Reserve units at Robins have continued flight operations amid the current COVID-19 crisis. The 339th FLTS is part of the 413th Flight Test Group and performs functional check flights on aircraft after programmed depot maintenance is completed. (U.S. Air Force photo by Jamal D. Sutter)
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