with everybody. we are not yet where we need to be on several of the most difficult issues. the truth is that while i completely agree with foreign minister sharif that we have never been closer at this point this negotiation could go either way. if hard choices get made in the next couple of days and made quickly, we could get an agreement this week. but if they are not made we will not. our teams remain very hard at work in the coming hours and days. we're going to go as hard as we can. we're not going to be negotiating in the press. we'll be negotiating privately and quietly. and when the time is right, we'll all have more to say. >> secretary kerry, how long are