U.S. Secretary of State John Kerry, left, talks to Syrian opposition coalition leader Mouaz al-Khatib, during an international conference on Syria at Villa Madama, Rome, Thursday, Feb. 28, 2013. (AP Photo/Riccardo De Luca)

Photo by: Riccardo De Luca

U.S. Secretary of State John Kerry, left, talks to Syrian opposition coalition leader Mouaz al-Khatib, during an international conference on Syria at Villa Madama, Rome, Thursday, Feb. 28, 2013. (AP Photo/Riccardo De Luca)