VIENNA (Reuters) - Iran and six major powers are ready to start drafting a long-term agreement on curbing Tehran's nuclear programme in exchange for sanctions relief but it is unclear if they will succeed in overcoming disagreements, a U.S. official said on Wednesday.
"Now we are set to start drafting," the senior administration official told reporters on condition of anonymity at the end of a two-day round of talks in Vienna between Iran and the United States, Britain, France, Germany, Russia and China.
