Two 36th Civil Engineer Squadron firefighters stand at attention during a September 11 memorial ceremony on Andersen Air Force Base, Guam, Sept. 11, 2019. Today marks the 18th anniversary of the deadliest terrorist attack on American soil. The 36th Civil Engineer Squadron fire department hosted a memorial ceremony followed by a memorial stair climb event to honor all the fallen first responders who paid the ultimate sacrifice. (U.S. Air Force photo by Staff Sgt. Divine Cox)