BIDEN NEXT?

The Associated Press
Associated Press
President Barack Obama, center and Beau Biden, Attorney of Deleware, right, watch as his father Joe Biden is sworn in at the ceremonial swearing-in at the U.S. Capitol during the 57th Presidential Inauguration in Washington, Monday, Jan. 21, 2013. (AP Photo/Pablo Martinez Monsivais)

The nation's No. 2 was sworn in a second time, for a second term.

Like President Barack Obama, Vice President Joe Biden took his oath of office during a private ceremony on Sunday. This one was for the masses.

Biden, a former Delaware senator, has attended a bunch of inaugural festivities.

The next one he attends may be his own if he decides to run for president in 2016 — and wins. He's certainly keeping the door open to a future presidential run.

—Liz Sidoti — Twitter http://twitter.com/lsidoti

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Inauguration Watch follows the events of President Barack Obama's second inaugural. Look for short items and photos throughout the day.