As William Maclean of Reuters reports, Iran has not let deals and agreements get in the way of its effort to build a bomb. He interviewed:
Vann Van Diepen, Principal Deputy Assistant Secretary of State for International Security and Non-Proliferation, [who] said Iran was still "very actively" creating front companies and engaging in other activity to conceal procurements ...
Asked if he had seen a change in Iranian procurement behavior in the past six to 12 months, a period that has seen a cautious thaw in U.S.-Iranian relations after decades of hostility, Van Diepen replied: "The short answer is no. They still continue very actively trying to procure items for their nuclear program and missile program and other programs."