Participants conduct a moment of silence for the emergency responders who lost their lives on Sept. 11, before the Tower Run at Yokota Air Base, Japan, Sept. 8, 2017. Approximately 70 people with 17 teams participated in the event to honor the emergency responders who lost their lives during the attacks of Sept.11. Firefighters from local communities also participated in the event. (U.S. Air Force photo by Machiko Arita)