A band prepares to lead President Barack Obama's inaugural parade on Capitol Hill in Washington, Monday, Jan. 21, 2013, after the president's ceremonial swearing-in ceremony during the 57th Presidential Inauguration. (AP Photo/New York Times, Doug Mills, Pool)

People wave at President Barack Obama and Vice President Joe Biden as their limousine passes Monday, Jan. 21, 2013, in Washington. (AP Photo/Charlie Neibergall )

People wave at President Barack Obama and Vice President Joe Biden as their limousine passes Monday, Jan. 21, 2013, in Washington. (AP Photo/Charlie Neibergall )

Luci Brown of South Bend, Ind., looks at the floats prepared for the 57th Presidential Inaugural Parade, Sunday, Jan. 20, 2013 in Washington. Thousands are planning to march in the 57th Presidential Inauguration parade after the ceremonial swearing-in of President Barack Obama on Monday. (AP Photo/Alex Brandon)

Worker Todd Williams prepares the street on Pennsylvania Avenue in front of the White House, Sunday, Jan. 20, 2013, in Washington. Thousands will march during the 57th Presidential Inauguration parade after the ceremonial swearing-in of President Barack Obama on Monday. (AP Photo/Gerald Herbert)

Security lines Pennsylvania Avenue in Washington, Monday, Jan. 21, 2013, prior to the start of the 57th Presidential Inaugural Parade which will take place following President Barack Obama's ceremonial swearing-in on Capitol Hill. (AP Photo/Alex Brandon)

Kevin Tamai with Hargrove Inc., works on a plane on the Tuskegee Airmen float prepared for the 57th Presidential Inaugural Parade, Sunday, Jan. 20, 2013 in Washington. Thousands are planning to march in the 57th Presidential Inauguration parade after the ceremonial swearing-in of President Barack Obama on Monday. (AP Photo/Alex Brandon)

Worker Rodney Hart, prepares the street on Pennsylvania Avenue in front of the White House, Sunday, Jan. 20, 2013, in Washington. Thousands will march during the 57th Presidential Inauguration parade after the ceremonial swearing-in of President Barack Obama on Monday. (AP Photo/Gerald Herbert)

The Inaugural Parade begins along Pennsylvania Avenue following the second inauguration of US President Barack Obama on January 21, 2013 in Washington, DC. AFP PHOTO/EMMANUEL DUNANDEMMANUEL DUNAND/AFP/Getty Images

The Inaugural Parade begins along Pennsylvania Avenue following the second inauguration of US President Barack Obama on January 21, 2013 in Washington, DC. AFP PHOTO/EMMANUEL DUNANDEMMANUEL DUNAND/AFP/Getty Images

The Inaugural Parade begins along Pennsylvania Avenue following the second inauguration of US President Barack Obama on January 21, 2013 in Washington, DC. AFP PHOTO/EMMANUEL DUNANDEMMANUEL DUNAND/AFP/Getty Images