A 96th Test Wing F-15E Strike Eagle prepares for in-flight refueling from a 155th Air Refueling Wing KC-135 Stratotanker during exercise Emerald Flag over the Gulf of Mexico, Dec. 3, 2020. More than 25 agencies participated in the exercise, hosted at Eglin Air Force Base, Fla. Emerald Flag combined ground, space, cyber, and air platforms for joint test and experimentation. (U.S. Air Force photo by Staff Sgt. Joshua Hoskins)