kevin lamarque/reuters

President Obama waved after his dance with Michelle Obama at the inaugural ball.

Jacquelyn Martin/Associated Press

Jennifer Hudson performed while President Obama danced with Air Force Staff Sergeant Bria Nelson and Michelle Obama danced with Marine Gunnery Sergeant Timothy Easterling.

CHIP SOMODEVILLA/epa

Alicia Keys performed at the inaugural ball.

Paul Sancya/associated press

Vice President Joe Biden and Jll Biden reacted to the crowd at the inaugural ball.

paul sancya/associated press

Stevie Wonder performed at the ball.

alex brandon/associated press

Members of the US Coast Guard marched in the inaugural parade.

Charlie Neibergall/Associated Press

The Boston Crusaders Drum & Bugle Corps performed while passing the presidential box in the parade.

Charlie Neibergall/Associated Press

The 54th Massachusetts Volunteer Infantry Regiment, Company B, Maryland, passed the presidential box during the parade.

derrick z. jackson/globe staff

President Obama took the oath of office from Chief Justice John Roberts.

derrick z. jackson/globe staff

President Obama delivered his inaugural address from the steps of the US Capitol.

President Obama waved to the crowd at the inauguration.

Getty Images

President Obama and wife Michelle waved during the inaugural parade.

Getty Images

Supporters waved flags and cheered during the ceremony.

Reuters

Beyonce sang the national anthem.

AP

Senator Elizabeth Warren attended the ceremony.

EPA

Hundreds of thousands of people packed the National Mall for the event.

Getty Images

Hillary and Bill Clinton greeted others at the ceremony.

AP

Supporters gathered in crowds for the ceremony.

AP

The Capitol building was decorated with flags for the ceremony.

Reuters

Senator John Kerry of Massachusetts took a photo.