Zarif Heading News Today : Breaking News, Live Updates & Top Stories | Vimarsana

While both sides may work past the deadline, a decision must be made. >> no extension. are we all agreed on that. everybody is very much aware of the fact that we have conditions now to close the deal. there's a good deal. and we have to use these hours, these days to do it. postponement is not an option. >> now years of negotiations and several months of work toward a nuclear framework has come down to this. a looming deadline that in the end just may not be reached. we have the latest on the sticking points preventing a final deal. >> reporter: barely five hours of meetings. the tuesday dead...

Billion. in vienna sunday came and went without a deal between the u.s. and iran two days before the deadline set for a nuclear agreement. >> iran's top negotiator has gone home for a short visit. nic robertson tells us why it's no longer clear just what kind of deal iran might be willing to accept. . >> reporter: barely five hourings of meetings. u.s. secretary of state john kerry and the foreign minister's nuclear negotiations are on pause. zarif heading back to tehran. gaps even in this final phase too big to bridge quickly. each delegations arriving at the talks venue expressing concerns...