WASHINGTON - JANUARY 18:  Crowds gather at the Lincoln Memorial on the National Mall for the opening ceremony of the inauguration of U.S. President-elect Barack Obama on January 18, 2009 in Washington, DC. The "Today - We Are One" free concert will include various performances by Stevie Wonder, Bruce Springsteen, Beyonce, U2 and other artists with an appearance by U.S. President-elect Barack Obama. Getty Images logo Getty Images 40 months ago

WASHINGTON - JANUARY 18: Crowds gather at the Lincoln Memorial on the National Mall for the opening ceremony of the inauguration of U.S. President-elect Barack Obama on January 18, 2009 in Washington, DC. The "Today - We Are One" free concert will include various performances by Stevie Wonder, Bruce Springsteen, Beyonce, U2 and other artists with an appearance by U.S. President-elect Barack Obama.