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Clinton: US must stick by Arab world's democracies

Vice President Joe Biden and Republican vice presidential nominee Rep. Paul Ryan, of Wisconsin, participate in the vice presidential debate at Centre College, Thursday, Oct. 11, 2012, in Danville, Ky. (AP Photo/Charlie Neibergall)

Vice President Joe Biden and Republican vice presidential nominee Rep. Paul Ryan, of Wisconsin, participate in the vice presidential debate at Centre College, Thursday, Oct. 11, 2012, in Danville, Ky. (AP Photo/Charlie Neibergall)