VIENNA - Differences in the positions of Iran and world powers over Tehran's nuclear program remain big and they face a 'difficult road' to reach a deal by a late November deadline, a senior Iranian negotiator said on Thursday. Deputy Foreign Minister Abbas Araqchi spoke to reporters after a day of talks in Vienna with the three European members of the group of six major powers that is seeking to negotiate an end to a decade-old nuclear dispute with Iran. Asked how big the differences were, he said: 'Still big.'
