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U.S. Air Force B-1B Lancer bombers flanked by U.S. Marine Corps F-35 Lightning II and Japan Air Self-Defense Force F-2 fighters execute a bilateral mission over the Pacific Ocean on Sept. 18, 2017, conducted in direct response to North Korea's intermediate range ballistic missile launch, which flew directly over northern Japan on Sept. 14. (Staff Sgt. Steven Schneider/Army)