A U.S. Air force F-15D Eagle Flies above the Mariana Islands in support of exercise Valiant Shield 18, Sept. 18, 2018. Valiant Shield is a U.S.-only, biennial field training exercise (FTX) with a focus on integration of joint training among U.S. forces in relation to current operational plans. This training enables real-world proficiency in sustaining joint forces through detecting, locating, tracking and engaging units at sea, in the air, on land, and in cyberspace in response to a range of mission areas. (U.S. Air Force photo by Senior Airman Zachary Bumpus)
U.S. Air Force/Senior Airman Zachary Bumpus
Whose Blue Yonder Is This, Anyway?