Inauguration 2013: The rehearsal

People go over details during an inauguration rehearsal on Capitol Hill January 13, 2013 in Washington, D.C. President Barack Obama and Vice President Joe Biden will be ceremonially sworn in for a second four-year term during the 57th Inauguration on January 21.

People gather to watch President Obama's inauguration rehearsal at the U.S. Capitol, on January 13, 2013 in Washington, D.C. President Barack Obama and Vice President Joe Biden will be ceremonially sworn in for a second four-year term during the 57th Inauguration on January 21.

Members of the U.S. armed services salute during an inauguration rehearsal on Capitol Hill January 13, 2013 in Washington, D.C.

Military personnel make preparations during an inauguration rehearsal at the U.S. Capitol, on January 13, 2013 in Washington, D.C.

Staff Sgt. Serpico Elliott, a stand in for President Barack Obama, waits to be introduced on stage during a rehearsal for the presidential inauguration at the U.S. Capitol January 13, 2013 in Washington, D.C.

U.S. Air Force Staff Sargent Serpico Elliott and Army Specialist Delandra Rollins stand in for President Barack Obama and Michelle Obama during a inauguration rehearsal on Capitol Hill, January 13, 2013 in Washington, D.C.

Air Force Staff Sgt. Serpico Elliott, and Army Specialist Delandra Rollins stand in for President Barack Obama and first lady Michelle Obama as they participate in a swearing in rehearsal for the presidential inauguration at the U.S. Capitol January 13, 2013 in Washington, D.C.

U.S.A.F. Staff Sgt. Serpico Elliott, stands in for President Barack Obama during an inauguration rehearsal at the U.S. Capitol, on January 13, 2013 in Washington, D.C.

Vehicles acting as stand-ins for the presidential motorcade roll down Pennsylvania Ave. during a dress rehersal for the Presidential Inaugural parade January 13, 2013 in Washington, D.C.

Members of the U.S. Army Band, also called "Pershing's Own," stand ready along Pennsylvania Avenue during a dress rehersal for the Presidential Inaugural parade January 13, 2013 in Washington, D.C.

Members of the U.S. military line 15th Street NW during a dress rehersal for the Presidential Inaugural parade January 13, 2013 in Washington, D.C.