President Barack Obama is sworn by Chief Justice John Roberts 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)
Declaring "our work begins today", President Barack Obama vowed to "finish what we started" four years ago as hundreds of thousands of inauguration-goers gathered on the historic National Mall for his oath-taking for a second term.
The weather forecast was encouraging, to a point. High temperatures were predicted for the lower 40s during the day, with a slight chance of rain and snow showers in the afternoon and flurries later.