SCHRIEVER AIR FORCE BASE, Colo. --Honor Guard member, Airman First Class Michael Gibson, 50th Force Support Squadron, reaches for the flag during retreat. Schriever Air Force Base honored and celebrated the Air Force's 70th Birthday with a retreat ceremony held in the courtyard of the Dekok Building, headquarters of the 50th Space Wing at Schriever AFB Colorado Sept. 18, 2017. The service was established as it's own branch of the Armed Forces on 18 September 1947. (U.S. Air Force Photo/Dennis Rogers)