Barack Obama smiles during a hearing on Capitol Hill in Washington

 
Barack Obama smiles during a hearing on Capitol Hill in Washington
Senator Barack Obama (D-IL) smiles during a hearing by the Senate Foreign Relations Committee on Capitol Hill in Washington January 17, 2007. Obama jumped into the 2008 White House race on Tuesday, promising to "change our politics" with a campaign that could make him the first black president in U.S. history. REUTERS/Kevin Lamarque (UNITED STATES)