Clayton, MO 9/11 Stair Climb
Firefighters with the 375th Civil Engineer Squadron out of Scott Air Force Base, Ill. ring a bell in honor of firefighters lost during the 9/11 attacks after a stair climb Sept. 7, 2014 in Clayton, MO. Firefighters were encouraged to wear their proper protection equipment, self-contained breathing apparatus and carry an appropriate hand tool or hose during the climb. Firefighters had to climb the equivalent of 110 stories in memory of the 343 firefighters that gave the ultimate sacrifice on 9/11. (U.S. Air Force photo/ Senior Airman Tristin English)