US President Barack Obama signs a proclamation to commemorate the inauguration, after he was sworn into office for a second term.

The proclamation to commemorate the inauguration, entitled a National Day of Hope and Resolve.

President Barack Obama (L) and Vice President Joe Biden listen as singer Beyonce sings the National Anthem during the presidential inauguration.

Obama is applauded by Senate Majority Leader Harry Reid, Senator Lamar Alexander, Senator Chuck Schumer, Vice President Joe Biden, House Speaker John Boehner, House Majority Leader Eric Cantor and House Minority Leader Nancy Pelosi.

Black and Latino (R) activists watch President Barack Obama take the oath of office, on a screen in Gardena, California.

Former president Jimmy Carter (L), Secretary of State Hillary Clinton and former president Bill Clinton (back) greet attendees at the swearing-in ceremonies.

US President Barack Obama is sworn in by Supreme Court Justice John Roberts (L), as first lady Michelle Obama and daughters, Sasha and Malia, look on during inauguration ceremonies in Washington.

US President Barack Obama recites his oath of office as first lady Michelle Obama looks on during swearing-in ceremonies on the West front of the Capitol in Washington DC.

Spectators react on the National Mall during the 57th inauguration ceremonies for US President Barack Obama and Vice President Joe Biden.

Barack Obama delivers his inaugural address during the presidential inauguration on the West Front of the US Capitol.

Singer Beyonce is greeted by Barack Obama after her performance during inauguration ceremonies.

Former president Bill Clinton (L) shakes hands with former president Jimmy Carter (R) ahead of the ceremonial swearing-in ceremonies for US President Barack Obama.