Iran told the United States in talks last week it was ready to accept some limits on its uranium enrichment but needed watertight guarantees President Donald Trump would not again ditch a nuclear pact,

Make Iran dismantle its nuclear and missile programs. Then its top negotiator started softening his tone, and had to retreat.

The United States and Iran are due to hold their second round of nuclear talks on Saturday, as what both sides are looking for in a deal begins to take shape.