The Air Force Band plays "The U.S. Air Force Song" during a rehearsal on Joint Base Andrews, Md., Jan. 11, 2013, to prepare for the 57th presidential inaugural parade. About 15,000 military personnel from 133 units will be participating in the parade on Inauguration Day, Jan. 21, 2013. The Air Force Band plays "The U.S. Air Force Song" during a rehearsal on Joint Base Andrews, Md., Jan. 11, 2013, to prepare for the 57th presidential inaugural parade. About 15,000 military personnel from 133 units will be participating in the parade on Inauguration Day, Jan. 21, 2013. SHARE: Download: Full Size (2.39 MB) Tags: Photo Essays Credit: VIRIN: 253835-C-NOW05-204.jpg Photo Gallery