The United States Air Force Band marches along Pennsylvania Avenue in Washington during the 57th Presidential Inaugural Parade Jan. 21, 2013. The U.S. military has participated in this important American tradition since April 30, 1789, when members of the U.S. Army, local militia units and Revolutionary War veterans escorted George Washington to his first Inauguration ceremony at Federal Hall in New York City. (U.S. Air Force photo by 1st Lt. Ashleigh Peck)