Analysis of Vance's letter to Moshan Razai The last chance for diplomacy or a prelude to war? The negotiations continue between Iran and America and have now reached the level of mediation to the letter of the Vice President of the United States to the Secretary of the National Security Council of Iran. A letter for which efforts should be made to communicate with the highest political levels in Iran, in order to prevent a recurrence of war. Click to read this report.