U.S. Air Force Airman Nizir Santiago, 100th Aircraft Maintenance Squadron crew chief, prepares a KC-135 Stratotanker for a flight supporting Operation Rapid Forge at RAF Mildenhall, England, July 23, 2019. Rapid Forge is a U.S. Air Forces in Europe-sponsored training event designed to enhance interoperability with NATO allies and partners, improve readiness and sharpen operational capabilities. (U.S. Air Force photo by Tech. Sgt. Emerson Nuñez)