Iran Today: Snapback: Mechanism or machination?

For nearly two decades, Iran's nuclear program has been caught in a storm of sanctions, sabotage, and broken promises.

Now, Europe has pulled the trigger on its most powerful weapon: the snapback. Six punishing UN resolutions, poised to return in full force. But is this about law or leverage? Why does Iran call it illegitimate? And could this be the moment Europe loses its last shred of credibility in the nuclear dispute?