Sept. 12, 2016 Airmen participate in 24-hour 9/11 stair climb An Airman carries an American flag up a flight of stairs during a 9/11 Memorial Stair Climb event held at Duke Field, Fla., Sept. 10. The 24-hour climb began at 8:46 a.m. with the 919th Special Operations Wing commander walking the flag up the outside stairwell of the base’s billeting facility.