Republican presidential candidate and former Massachusetts Gov. Mitt Romney campaigns with vice presidential candidate Paul Ryan in Fishersville, Va., Thursday, Oct. 4, 2012.

A veiled Palestinian supporter of the Islamic Jihad attends a rally to mark the 25th anniversary of the movement in Gaza City, Thursday, Oct. 4, 2012.

Life size toy horses that are used as props by a street photographer stand along Chapultepec Lake in Mexico City, Thursday, Oct. 4, 2012. Tourists pose with the horses for souvenir portraits.

Army Staff Sgt. Travis Mills plays with his daughter Chloe in his boyhood home in Vassar, Mich., Thursday, Oct. 4, 2012. Mills is visiting his hometown for the first time since losing all four limbs while fighting in Afghanistan. Mills, his wife, Kelsey, and their 1-year-old daughter, Chloe, will be the grand marshals of Vassar High School's homecoming parade on Thursday evening.

Riot police clash with protesters inside Greece's Defense Ministry in Athens, Thursday, Oct. 4, 2012. Police clashed with scores of protesting shipyard workers after they forced their way into the grounds of Greece's Defense Ministry. The workers say they have not been paid in months.

In this Sept. 26, 2012 photo, a woman walks by Louis Vuitton store at the Alvear Avenue, in Recoleta neighborhood in Buenos Aires, Argentina. The world's most luxurious designer brands are abandoning Argentina rather than complying with tight new government economic restrictions, leaving empty shelves and storefronts along the capital's elegant Alvear Avenue, where tourists once flocked to see the latest in fashion.