Unclear 'how much of a negotiation is taking place' between US and Iran

Iran has received a US plan to pause the war in the Middle East, officials said on March 25 — a proposal sent even as Washington deploys paratroopers and more Marines to the region. Tehran did not confirm receiving the plan and publicly dismissed Washington's diplomatic efforts. For FRANCE 24's Philip Turle, a lot of aspects of those negotiations remain unclear: how far have they gone, who is the US dealing with, and what the US is deploying troops in the Middle East for amid as it says it is engaging in negotiations.