Vice President Debate: Joe Biden's many faces

Vice President Joe Biden and Republican vice presidential candidate, Rep. Paul Ryan, R-Wis., shake hands before the start of the vice presidential debate, at Centre College in Danville, Ky., Thursday, Oct. 11, 2012. (AP Photo/Pablo Martinez Monsivais) <span class=meta>(AP Photo/ Pablo Martinez Monsivais)</span>
October 12, 2012 10:13:59 AM PDT