U.S. service members and civilians participate in the 6th annual 9/11 memorial stair climb at Marine Corps Air Station Iwakuni, Japan, Sept. 11, 2020. Marines with Aircraft Rescue and Firefighting hosted the event for station residents to honor and remember those who paid the ultimate sacrifice on Sept. 11, 2001. Participants climbed the tower 22 times to simulate what first responders endured on that day.