From left, U.S. Secretary of State John Kerry, European Union High Representative Catherine Ashton, and Iranian Foreign Minister Mohammad Javad Zarif are photographed as they participate in a trilateral meeting in Vienna, Austria, Wednesday, Oct. 15, 2014. The three will try and advance nuclear talks and meet the target date of Nov. 24. But with less than six weeks left until Nov. 24, there may be no alternative than to prolonging them. (AP Photo/Carolyn Kaster, Pool)