Both a Danish Air Force and a Royal Netherlands Air Force F-35 Lightning II's receive fuel from a U.S. Air Force KC-135 Stratotanker from the 100th Air Refueling Wing in support of Ramstein Flag 25 over the North Sea, April 3, 2025. Ramstein Flag 25 increased the ability of the U.S.’ collective partners to collaborate and operate in a joint, high-intensity environment, which improved readiness, responsiveness, and interoperability.