European Union foreign policy chief Catherine Ashton (L) and Iranian Foreign Minister Mohammad Javad Zarif wait for the start of talks in Vienna May 14, 2014. Six world powers and Iran launch the decisive phase of diplomacy over Tehran’s nuclear work during three-day talks starting in Vienna on Wednesday, with the aim of resolving their decade-old dispute by July 20 despite skepticism a deal is possible. REUTERS/Leonhard Foeger (AUSTRIA – Tags: POLITICS ENERGY)