Ahead of his swearing in Sunday, Obama, along with Vice President Joe Biden, solemnly honored the nation's fallen soldiers during a wreath-laying ceremony at Arlington National Cemetery. On a crisp, sun-splashed morning, Obama and Biden placed a large wreath adorned with red, white and blue ribbon, in front of Arlington's Tomb of the Unknowns. Placing their hands over their hearts, the two leaders stood motionless as a bugler played "Taps."
From Arlington, Obama joined his family at a church service celebrating Martin Luther King Jr. The president's public swearing-in on Monday coincides with the national holiday marking the fallen civil rights leader's birthday, and Obama has invoked King's memory throughout the lead-up to the inauguration.
The Rev. Jonathan V. Newton, an assistant pastor at Metropolitan African Methodist Episcopal Church, prayed for God to prepare Obama for battle, "because sometimes enemies insist on doing it the hard way."
Biden took the oath of office earlier in the morning, surrounded by family and friends for a brief ceremony at the Naval Observatory, his official residence in northwest Washington. Justice Sonia Sotomayor, appointed by Obama as the first Hispanic to serve on the Supreme Court, administered the oath of office to Biden, who placed his hand on a Bible his family has used since 1893.
Among the 120 guests on hand to witness the vice president's second swearing-in were Attorney General Eric Holder, departing Interior Secretary Ken Salazar and several Democratic lawmakers.
A crowd of up to 800,000 people is expected to gather on the National Mall to witness Obama's second swearing-in, which will take place on the Capitol's red, white and blue bunting-draped west front. Roberts, who famously flubbed the oath of office that Obama took in 2009, will administer the oath on Monday.