Presidential Inaugural Parade practice
Col. Larry Lang, U.S. Air Force Band commander and conductor, leads the band in a musical selection during rehearsal for the 57th Presidential Inaugural Parade on Joint Base Andrews, Md., Jan. 11, 2013. Approximately 15,000 military personnel from 133 units will be participating in the parade January 21, 2013. (U.S. Air Force photo/ Airman 1st Class Erin O’Shea)

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