The U.S. Special Representative for Iran, Brian Hook, posited that “the oil sanctions alone are going to deny the Iranian regime $50 billion in revenue annually… pressure is going to continue. This is not sustainable for the Iranian regime”. Hook went on to say that “we think a final deal needs to address the entire range of threats that Iran presents to peace and security. Not only in the Middle East but in most continents of the world where they've conducted terrorist attacks either directly or through Hizbollah”. He also asserted that “right now, there are no back-channel talks between the U.S. and Iran”.