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Two U.S. Air Force B-1B Lancers pass over a Republic of Korea air force F-15 during a 10-hour mission from Andersen Air Force Base, Guam, into Japanese airspace and over the Korean Peninsula, July 30, 2017. The B-1s first made contact with Japan Air Self-Defense Force F-2 fighter jets in Japanese airspace, then proceeded over the Korean Peninsula and were joined by South Korean F-15 fighter jets. This mission is part of the continuing demonstration of ironclad U.S. commitment to our allies. (Courtesy photo)