Master Sgt. Mario Rainge, 374th Communications Squadron first sergeant, runs up a flight of stairs during the 9/11 Tower Run, Sept. 11, 2019 at Yokota Air Base, Japan. The relay style event had each member of the 4-member teams ascended and descended to the 9th floor of a tower 3 times wearing a roughly 30-pound self-contained breathing apparatus air pack collectively combing the 110 floors of the World Trade Center. (U.S. Air Force photo by Machiko Arita)