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Four U.S. Marine F-35B Lightning IIs conduct a bombing run with live munitions on Pilsung Training Range, Republic of Korea, Sept. 18, 2017, to display their ability to integrate with Allied air forces and project power in response to North Korean aggression. Last Friday North Korea launched an intercontinental ballistic missile with the capability to reach the U.S. soil in addition to Allies in the Pacific. The show of force flight demonstrated U.S. resolve and capability to aid its Allies under threat and ensure their national security. (U.S. Air Force photo by Capt. Joseph Cole/Released)