Trump has a stark choice - escalate or negotiate
Lyse Doucet
BBC Chief international correspondent, in Islamabad
The US Vice-President called it good news and bad news. Good news that they had substantive discussions with the Iranians. Bad news that they have not reached an agreement.
He called that bad news for Iran.
The length of this single negotiating session was significant and surprising.
But it’s not surprising that a deal wasn’t reached.
The Americans came to Pakistan with a view that Iran had suffered so badly in this war that quick compromises were possible.
"They have not chosen to accept our terms," Vance announced.
But Iran also has its own red lines.
It approached these negotiations believing it had a strong hand. Despite major damage to its military capabilities, it’s still able and willing to keep fighting.
And it still has significant leverage especially in its control over the strategic Strait of Hormuz.
The last time Tehran and Washington reached a nuclear deal a decade ago it took 18 months of breakthroughs and breakdowns.
Trump now has confronts a stark choice – escalate or negotiate.