U.S. Air Force Staff Sgt. Mark Melchiori, 435th Security Forces Squadron jump master, practices outside air safety check procedures while wearing a cloth mask to mitigate the transmission of coronavirus disease 2019 at Rhine Ordnance Barracks, Kaiserslautern, Germany, April 7, 2020. During airborne operations, the jump master is responsible for ensuring the drop zone is safe and there are no dangers that can impede the paratrooper’s safety. (U.S. Air Force photo by Staff Sgt. Devin Nothstine)