U.S. Air Force F-15E Strike Eagles assigned to the 48th Fighter Wing, RAF Lakenheath, United Kingdom, prepare to receive fuel from a KC-135 Stratotanker assigned to the 100th Air Refueling Wing, RAF Mildenhall, United Kingdom, during exercise Valiant Liberty off the coast of England, March 5, 2020. Valiant Liberty is an agile combat employment exercise which allows U.S. and allied forces to deter, defend and win across the spectrum of conflict. (U.S. Air Force photo by Tech. Sgt. Emerson Nuñez)