Iran's Difficult Choises

Meir Javedanfar penned a nice piece in The Guardian in which he casts pessimism over the results expected from the World powers talks with Iran.
He asks if Iran could afford a nuclear U-turn.

This is now an even more difficult decision for the Iranian leadership to take, as they have already sold their "victory" to the Iranian public. To comply would mean an embarrassing U-turn. After the recent disturbances at home, this could damage the conservatives' position. However, if they don't agree to it, crippling sanctions, or even war, could follow