57th-Inaug

US President Barack Obama (l) receives the oath of office from Chief Justice John Roberts (bottom, c) during ceremonial swearing-in at US Presidential inauguration ceremony with US First Lady Michelle Obama (r) holding Dr. Martin Luther King Jr. and Lincoln bibles, Washington DC. (AP Photo)

Barack-Obama

US President Barack Obama delivers second inaugural address during 57th inauguration ceremony, Washington DC. (AP Photo)

Beyonce

Beyonce sings the national anthem during ceremonial swearing-in at 57th Presidential Inauguration ceremony for US President Obama, Washington DC. (AP Photo)

Biden's-hand

Hand of US Vice President Joe Biden rests on a family bible as he takes the oath of office for a second term, with wife Jill holding bible, during 2013 inauguration swearing-in ceremony, US Naval Observatory, Washington, DC (AP Photo)

Biden's-oath

Joe Biden, as US Vice President (l), takes the oath of office for a second term; with wife Jill holding bible; from Associate Supreme Court Justice Sonia Sotomayor (r), during 2013 inauguration swearing-in ceremony, US Naval Observatory, Washington, DC. (AP Photo)

Clarkson

Kelly Clarkson sings during ceremonial swearing-in at 57th Presidential Inauguration ceremony for US President Obama, Washington DC. (AP Photo)

Flags-west-front-US-Capitol

US Flags draped on west front of US Capitol during preparations for 2013 Obama Inauguration ceremonies, Washington, DC. (AP Photo)

In-the-Blue-Room

Michelle Obama (l), as US first lady, Barack Obama (back to camera), as US President, hugs his daughter, Malia, with daughter Sasha (r) looking on, Blue Room, White House, 57th Presidential Inauguration. (AP Photo)

Inaugural-reception

Michelle Obama, as US first lady, acknowledges the crowd during an inaugural reception, 57th Presidential Inauguration, The National Building Museum, Washington, DC. (AP Photo)

Jay-Z-and-Beyonce

Rapper Jay-Z and singer Beyonce Knowles (l-r), arrive for 57th Presidential Inauguration of US President Obama, Washington, DC (AP Photo)

Mr-and-Mrs

Barack Obama, as US President (l), takes the official oath of office for a second term, with first lady Michelle Obama holding the Robinson family Bible, Blue Room of the White House, Washington, DC (AP Photo)

Obama-family

Barack Obama, as US President (l), is officially sworn-in for a second term by Chief Justice John Roberts (r, bottom), with first lady Michelle Obama holding the Robinson family Bible and daughters Malia and Sasha watching, Blue Room of the White House. (AP Photo)

Obama-public-oath

US President Barack Obama (l) receives the oath of office from Chief Justice John Roberts (bottom right) at the ceremonial swearing-in at 57th inauguration ceremony, US First Lady Michelle Obama holds Dr. Martin Luther King Jr. and Lincoln bibles as daughters Malia and Sasha look on, Washington DC (AP Photo)

Presidential-kiss

Michelle Obama (r), as US first lady, and Barack Obama (l), as US President, kiss during inaugural reception, 57th Presidential Inauguration, National Building Museum, Washington, DC (AP Photo)

Private-oath

Barack Obama, as US President (l), is officially sworn-in for a second term by Chief Justice John Roberts (r, bottom), with first lady Michelle Obama holding the Robinson family Bible and daughters Malia and Sasha watching, Blue Room of the White House. (AP Photo)

Public-oath

US President Barack Obama (l) receives the oath of office from Chief Justice John Roberts (bottom, c) during ceremonial swearing-in at US Presidential inauguration ceremony with US First Lady Michelle Obama (r) holding Dr. Martin Luther King Jr. and Lincoln bibles. (AP Photo)

Sasha-and-Malia-Obama

Sasha and Malia Obama (l-r) attend US Presidential Inauguration ceremony for their father US President Obama. (AP Photo)

Spectator-in-the-crowd

A spectator waiting on the National Mall in Washington, DC. (AP Photo)

View-from-the-back

US President Barack Obama delivers inaugural address during 57th inauguration ceremony. (AP Photo)

Walking-to-church

Barack Obama (r), as US President, waves as he walks with his daughters Sasha and Malia, to St. John's Church, Washington, DC (AP Photo)

White-House

US President Barack Obama delivers inaugural address during 57th inauguration ceremony at the US Capitol building, Washington DC. (AP Photo)

Michelle-Obama

Michelle Obama, as US first lady, leaving St. John's Church, Washington, DC. (AP Photo)

Barack-Obama

Barack Obama, as US President, pauses and looks back after the ceremonial Inauguration ceremony for his second term, Washington DC (AP Photo)

Hillary-and-Bill-Clinton

US Secretary of State Hillary Rodham Clinton and former US President Bill Clinton (AP Photo)

US Secretary of State Hillary Rodham Clinton and former US President Bill Clinton (AP Photo)

Kelly-Clarkson-and-Brandon_Blackstock

Kelly Clarkson, singer, and fiancee Brandon Blackstock (r-l), arrive at Presidential Inauguration, Washington, DC. (AP Photo)

Richard-Blanco

Richard Blanco, poet, speaks during 57th Presidential Inauguration ceremony for US President Obama, Washington DC. (AP Photo)

Pres-and-FL-dance

Barack Obama (r), as US President, and Michelle Obama (l), as first lady, share a dance, Commander-In-Chief Inaugural Ball, 57th Presidential Inauguration (AP Photo)

President-and-First-Lady-dance

Barack Obama (l), as US President, kisses Michelle Obama (r), as first lady, during their dance, Commander-in-Chief Inaugural Ball, 57th Presidential Inauguration (AP Photo)