The behavior of European leaders towards Zarif shows how frightened they are of Iran and how these non-stop moralists will seemingly do anything for money.
In light of Israel's evidence that Iran lied about its weapons program, the question should not be whether there is any proof that Iran is in breach of the nuclear deal, but whether there is any proof that it is complying with it.
As the Iran nuclear talks march toward the deadline in June, US Senators are working to convince their colleagues to give Congress oversight on any final deal.