A U.S. Air Force F-15C Eagle aircraft assigned to the 48th Fighter Wing, Royal Air Force Lakenheath, England, departs after receiving fuel from a KC-135 Stratotanker aircraft assigned to the 100th Air Refueling Wing, RAF Mildenhall, England, during exercise High Life over the North Sea, Sept. 15, 2021. Training with joint and combined allies and partners during ACE events increases lethality and enhances interoperability, allowing U.S. forces to counter military aggression and coercion by sharing responsibilities for common defense. (U.S. Air Force photo by Senior Airman Joseph Barron)