Osan honors 9/11 first responders
U.S. Air Force firefighters with the 51st Civil Engineer Squadron walk up a flight of stairs during a 9/11 memorial stair climb at Osan Air Base, Republic of Korea, Sept. 11, 2018. The stair climb was intended to honor those emergency responders who gave their lives saving others at the World Trade Center in New York City. (U.S. Air Force photo by Senior Airman Kelsey Tucker)

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Photo by: Senior Airman Kelsey Tucker |  VIRIN: 180911-F-DV125-1310.JPG