Analysis: As clock runs down on Vienna talks, key obstacles remain to be cleared by Tehran and the west
The countdown to the end of the six-month-long talks in Vienna on the future of the Iran nuclear deal has begun. No deadline has been formally set, but if there is no progress in less than two weeks the process will come to an end leaving a dangerous vacuum.
The White House has already been rolling the pitch preparing its political lines for a breakdown by saying the US withdrawal from the agreement by Donald Trump in 2018 has proved to be a disaster. If there is no agreement, the Biden team intend Trump will take the blame.
