507th CES Fire climb
Senior Airman Zachary Mandevill, a firefighter from the 507th Civil Engineer Squadron, carries a hose up the fire training tower during the annual 9/11 fire climb Sept. 13, 2015 at Tinker Air Force Base, Okla. This marks the 6th year that the Reservists have commemorated the victims and workers of 9/11 attacks by climbing the fire training tower for 56 minutes, which is the time it took for the south tower to collapse after being struck by an airliner. (U.S. Air Force photo/Maj. Jon Quinlan)