Airmen of the Air Force cordon march down Pennsylvania Avenue in Washington to their designated location prior to the start of the 57th Presidential Inaugural Parade Jan. 21, 2013. Airmen participating in the Inaugural events represented one component of the integrated total force - Soldiers, Marines, Sailors, Airmen, and Coast Guardsmen - proudly serving their country at home and around the world. (U.S. Air Force photo by 1st Lt. Ashleigh Peck)