Vice President Joe Biden steps to the podium for a microphone check in preparation for his speech at the Democratic National Convention early Thursday, Sept. 6, 2012, in Charlotte, N.C.

 

              Vice President Joe Biden steps to the podium for a microphone check in preparation for his speech at the Democratic National Convention early Thursday, Sept. 6, 2012, in Charlotte, N.C.
Vice President Joe Biden steps to the podium for a microphone check in preparation for his speech at the Democratic National Convention early Thursday, Sept. 6, 2012, in Charlotte, N.C. (AP Photo/David Goldman)