Even if the talks fail to produce a deal, a return to an all-out war may still be averted.

The ceasefire is welcome but fragile. Friday’s talks in Islamabad must address Iran’s nuclear programme and avoid sidelining the rest of the region, says Sanam Vakil of Chatham…

A US 15-point plan and an Iranian 10-point variant are oceans apart, writes the BBC's diplomatic correspondent.

The key deliverable may simply be the willingness of all parties to meet again