galleryPresident Obama’s Second Inauguration (PHOTOS)01.21.13galleryPresident Obama’s Second Inauguration (PHOTOS)President Obama took the ceremonial oath of office for his second term on Monday, with an estimated 600,000 people traveling to the capital to watch. See photos.01.21.13 2:36 PM ETChip Somodevilla/GettyObama InaugurationPresident Obama took the ceremonial oath of office for his second term on Monday, with an estimated 600,000 people traveling to the capital to watch. See photos. Paul Sancya/APPresident Barack Obama and first lady Michelle Obama wave to the crowd at The Inaugural Ball.Charlie Neibergall/GettyTexas's Palmview High School Mariachi and Folkloric Group perform while passing the presidential box and the White House during the Inaugural parade.Jose Luis Magana/APThe Miami University, Ohio, Marching Band marching band performs.Mark Wilson/GettyMounted members of the military ride horses as the presidential inaugural parade winds through the nation's capital.Charles Dharapak/AP Barack and Michelle Obama wave as they walk down Pennsylvania Avenue during the Inauguration parade. Cliff Owen/AP Barack and Michele Obama (L), Army Major General Michael Linnington, Joe and Jill Biden place their hands over their hearts as they review the troops at the start of the inaugural parade.Allison Shelley/Getty Barack Obama shares a moment with House Speaker John Boehner as first lady Michelle Obama applauds at the Inaugural Luncheon in Statuary Hall at the U.S. Capitol building. Pool President Barack Obama (R) laughs with (L-R) Sen. Harry Reid, Sen. Lamar Alexander, and Sen. Chuck Schumer after signing a proclamation to commemorate the inauguration.Brendan Smialowski, AFP/Getty Barack Obama and his wife Michelle leave after completing the oath of office.Gabriel B. Tait/MCT, via Getty Images Addie Tucker, 5, of Atlanta, Georgia, holds on to David Tucker, 55, also of Atlanta, while watching the inauguration from the National Mall.Khue Bui for Newsweek Beyoncé performing the National Anthem at the inauguration ceremony. Rob Carr, Pool/Getty President Obama gives his inauguration address, highlighting the notion that "all men are created equal" and specifically calling out Martin Luther King, Jr. Andrew Harrer, Bloomberg/Getty Barack Obama, takes the oath of office from Supreme Court Chief Justice John Roberts, right, as first lady Michelle Obama holds the Lincoln Bible and the traveling bible of slain civil rights leader Martin Luther King Jr. during the presidential inauguration.Joe Raedle/Getty People cheer as on the National Mall during the Inauguration ceremony.Jonathan Ernst/Getty Barack Obama (C) pauses with his escorts before the start of the presidential swearing-in ceremony.Win McNamee/Getty Joe Biden arriving at the swearing in ceremony.Chris Maddaloni, Roll Call/Getty Former President Jimmy Carter, Secretary of State Hillary Clinton, and former President Bill Clinton arrive at the inauguration ceremony at the Capitol.Mark Wilson/Getty First lady Michelle Obama and daughters Sasha and Malia arrive for the presidential inauguration. Chris Maddaloni, Roll Call/Getty Katy Perry attending the inauguration ceremony at the Capitol.