Representative Paul Ryan, Republican vice presidential candidate, right, shakes hands with U.S. Vice President Joseph "Joe" Biden before the start of a debate in Danville, Kentucky, U.S., on Thursday, Oct. 11, 2012. Ryan said President Barack Obama is presiding over a “chaotic” foreign policy that is "unraveling'' and making the US. “less safe,” as he began his debate tonight with Biden. Photographer: Scott Eells/Bloomberg via Getty Images
