U.S. Vice-President Joe Biden sworn in for second term

Vice President Joe Biden shakes hands with US Supreme Court Justice Sonia Sotomayor after taking the oath of office during the 57th Presidential Inauguration official swearing-in ceremony at the Naval Observatory on Sunday, January 20, 2013 in Washington. (AP / Saul Loeb)

WASHINGTON -- U.S. Vice-President Joe Biden has been sworn in to a second term.

The 70-year-old Biden took the oath of office from Supreme Court Justice Sonia Sotamayor during a private ceremony Sunday at the U.S. Naval Observatory, the vice-president's residence.

Biden and President Barack Obama will take the oath of office again on Monday during a public ceremony at the Capitol.