Lt. Gen. Thomas W. Bergeson, 7th Air Force commander, and Republic of Korea air force Maj. Gen. Hong, Jae Ki, Republic of Korea Air Forces Operations Center vice commander, greet F-15K Slam Eagle pilots after a mission escorting a U.S. Air Force B-1B Lancer to Osan Air Base, Republic of Korea, Sept. 21, 2016. The B-1, which is the operational backbone of the U.S. long-range bomber mission, had just conducted its closest flight to the North Korean border ever. (U.S. Air Force photo by Senior Airman Victor J. Caputo)