A senior U.S. diplomat indicated that “Iran has been notably measured in building up its nuclear capabilities, even in – even though these are violations of its JCPOA commitments. Iran does not seem to wish to antagonize the remaining participants in the JCPOA – the E3, Russia and China. They don’t want to provoke a full snapback of UN Security Council sanctions”. “Going back to the full-scale pursuit of a plutonium production reactor [at Arak] would be an extraordinary provocation that I think is relatively unlikely for them to undertake even if they had the money with which to do so”, he added, also noting that “no one can forget what happened the last time someone tried to build a plutonium production reactor in the Middle East… which was of course destroyed by the Israelis in 2007”.