Outfront tonight, cnn just learning that the president sent a secret letter to the ayatollah, the iran Supreme Leader. It says they have a shared interest in beating isis. Josh earnest wont even acknowledge existence of the letter saying only it came up in negotiation during Nuclear Negotiations with iran. We have also discussed on the side lines of those talks, on a couple of occasions, the Ongoing Campaign that is being conducted against isil by the United States. Chief National Security correspondent jim sciutto is outfront tonight. This is a huge thing that has happened. They are still not talking about the secret letter directly, and you are learning it is not just a letter. That is right. Im told that the u. S. Has opened Communication Channels with iran, via the iraqis regarding action with isis and this is what im told by a senior diplomat. It is not coordinating military action toward isis but it is necessary for what the military calls deconflict in military operations. The c