The crowds aren't as big as the ones that saw President Barack Obama's first inauguration four years ago -- but at least one public viewing area on the National Mall was full, two hours before today's swearing-in.
Organizers are expecting 700,000 people to attend today's events, which would make it the largest second-term inaugural in history.
You can watch the events on our CBS News Livefeed page. Events are scheduled as follows:
11:20 a.m. - Ceremonial swearing-in at the Capitol.
The order of the program:
• Musical selections: The U.S. Marine Band
• Musical selections: P.S. 22, Staten Island in N.Y., and Lee University Festival Choir, Cleveland, Tenn.
• Call to order and welcoming remarks: Sen. Chuck Schumer, D-N.Y.
• Invocation: Myrlie Evers-Williams
• Musical selection: Brooklyn Tabernacle Choir
• Oath of office administered to Vice President Biden: Associate Justice Sonia Sotomayor
• Musical selection: James Taylor
• Oath of office administered to President Obama: Chief Justice John Roberts
• Inaugural address: President Obama
• Musical selection: Kelly Clarkson
• Poem: Richard Blanco
• Benediction: the Rev. Luis Leon of St. John's Church, Washington
• The National Anthem: Beyoncé
1:05 p.m. - Obama, Biden and their wives attend the inaugural luncheon.
2:40 p.m. - Inaugural parade begins. The Obamas and Bidens participate in a parade featuring floats and vehicles representing about 60 groups. Viewing stands and bleachers are lined along Pennsylvania Avenue.
6 p.m. - The Commander in Chief's Inaugural Ball at the Washington Convention Center. The gala honors service members and their families.
6:30 p.m. - The Inaugural Ball at the Washington Convention Center.