Members of the Aurora Police Department Honor Guard observe Patriot Day with Team Buckley members Sept. 11, 2015, at the Headquarters Building on Buckley Air Force Base, Colo. Patriot Day is the national day of service and remembrance, in memory of the thousands killed on U.S. soil in the 9/11 attacks. (U.S. Air Force photo by Senior Airman Phillip Houk/Released)