VIENNA - The likelihood of Iran and six world powers reaching a final comprehensive agreement over Tehran's nuclear program by a Nov. 24 deadline is "very small," a European source close to the talks in Vienna said on Saturday.The source, who spoke on condition of anonymity, said discussions about the possibility of extending the negotiations beyond Monday's self-imposed deadline might begin on Sunday.There had been no significant progress so far on the main stumbling blocks of Iran's uranium enrichment capacity and the lifting of sanctions imposed on Iran over its nuclear program, the source said.
