But a defiant speech by Iran's supreme leader less than a week before a negotiating deadline casts doubt on whether he's willing to make the necessary concessions to seal a deal.
The talks, which resumed Wednesday in Vienna on restraining any Iranian efforts to make atomic arms, appeared to be behind schedule judging by the draft document obtained by The Associated Press.
The draft, one of several technical appendices meant to accompany the main body of any deal, has bracketed text in dozens of places where disagreements remain.
