U.S. Secretary of State John Kerry (right) and Iran's Foreign Minister Javad Zarif (left) shake hands as Oman's Minister for Foreign Affairs Yussef bin Alawi (second from right) and the former EU top diplomat Catherine Ashton watch in Muscat, Oman on Nov. 9. Iran is holding talks with six world powers in Vienna this weekend in advance Monday's deadline for a deal on Iran's nuclear program. (AFP/Getty Images)
