Air Force cordon members test their radios as they prepare for the 57th Presidential Inaugural Parade Jan. 21, 2013 in Washington. Providing an Air Force cordon was one of the many ways the Air Force supported the inaugural events. Other support came from Air Force Bands and Choruses, Honor Guards, Marching Units, Reserve and Guard, as well as myriad contingency, communication, and command and control operations taking place behind the scenes. (U.S. Air Force Photo by 1st Lt. Ashleigh Peck)