see more

Delaware Attorney General Beau Biden, son of U.S. Vice President Joseph Biden, gestures while arriving to speak on day three of the Democratic National Convention (DNC) in Charlotte, North Carolina, U.S., on Thursday, Sept. 6, 2012. President Barack Obama's prime-time nomination acceptance speech tonight at the DNC will be aimed at convincing voters that a slow economic recovery will accelerate if they give him a second term. Photographer: Scott Eells/Bloomberg via Getty Images

Delaware Attorney General Beau Biden, son of U.S. Vice President Joseph Biden, gestures while arriving to speak on day three of the Democratic National Convention (DNC) in Charlotte, North Carolina, U.S., on Thursday, Sept. 6, 2012. President Barack Obama's prime-time nomination acceptance speech tonight at the DNC will be aimed at convincing voters that a slow economic recovery will accelerate if they give him a second term. Photographer: Scott Eells/Bloomberg via Getty Images