Iran talks appear to be on cusp of nuclear deal

After more than two weeks of intense and often combative talks that blew through three deadlines in Vienna and a weekend of deadlock, diplomats expressed optimism that a deal was at hand.

U.S. Secretary of State John Kerry, who on Thursday had threatened to walk away from the negotiations, note that "a few tough things" remain in the way of agreement but added: "We're getting to some real decisions."

Iranian foreign minister to join nuclear talks on Friday

France announced Thursday that Foreign Minister Laurent Fabius is joining the talks in Vienna on Saturday. 

Iranian media reported earlier that Foreign Minister Mohammad Javad Zarif will fly to Vienna on Friday. That's the day U.S. Secretary of State John Kerry departs Washington for the Austrian capital