Monday's public inauguration ceremony will be witnessed by hundreds of thousands of people on the National Mall in Washington, DC.
The Second Inauguration of President Barack Obama

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Members of the Lee University Festival Choir and PS 22 Chorus perform before the ceremonial swearing-in of President Barack Obama at the U.S. Capitol during the 57th Presidential Inauguration, Jan. 21, 2013.

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Security lines Pennsylvania Avenue in Washington, Monday, Jan. 21, 2013, prior to the start of the 57th Presidential Inaugural Parade.

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Secretary of State Hillary Clinton and former President Bill Clinton speak with former President Jimmy Carter at the ceremonial swearing-in for President Barack Obama at the U.S. Capitol in Washington, Jan. 21, 2013.

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People wave at President Barack Obama and Vice President Joe Biden as their limousine passes Monday, Jan. 21, 2013, in Washington.