Everyone (hopefully) knows Obama was the first African American president. He was also just the fifth African American senator in more than a century since the Civil War. The U.S. federal government hasn't exactly been tops in the ol' diversity department. (Source)

In 2008, John McCain's campaign ran an ad comparing Obama to celebrities like Paris Hilton. His inauguration attracted a record crowd. He certainly wasn't an L.A. socialite with his own fragrance line, but he was definitely a rock star. (Source)

At the inauguration, Supreme Court Chief Justice John Roberts messed up the word order when saying the presidential oath. Oops. The next day, they repeated the oath in the White House, just to be safe. This is way worse than your voice cracking during the national anthem. (Source)

The 2009 inauguration ceremony cost $150 million. Obama's speech lasted about 22 minutes. Sure, there were other people involved (including a performance by the Queen of Soul herself, Aretha Franklin), but that comes out to $6.8 mil per minute of the inaugural address. (Source)

Jon Favreau wrote drafts of the 2009 inaugural address in a D.C. Starbucks. He admits to favoring double espresso shots, staying up all night when writing, and taking breaks to play Rock Band. Presidential speechwriters: they're just like us. (Source)

The night before his inauguration, Obama did a dinner crawl around Washington to promote bipartisanship. He even attended a dinner for John McCain, where he praised his former opponent's patriotism and service. (Source)