Senior security source: Iran did not respond to Vance's letter In an interview with Fars, an informed source said that it is not unusual for American officials to write letters to Iran, and this happened in some cases from the time of Imam Rahel to Barack Obama's letter to the leader of the revolution. This informed official confirmed that J. Dee Vance, US Vice President, sent a message to Major General Mohsen Razai, Secretary of Iran's Supreme National Security Council. According to this source, Iran has not yet responded to this message and the media speculations about the content of the message are incorrect.