Leaders express concern at Tehran's threat to step up enrichment, while hoping Iranian president is chiefly seeking to show strength domestically

As White House escalates tensions, Democratic senators and groups call for legislation disallowing an attack on Iran without Congressional approval

Germany calls on Tehran to uphold its end of 2015 accord, while UK warns Islamic Republic of 'consequences' if it doesn't honor its commitments

French diplomat says Europe may reimpose sanctions if Iran pulls out of deal as Tehran hints at retaliatory actions on anniversary of US leaving pact

A look at the IAEA's work in monitoring implementation of Joint Comprehensive Plan of Action -- the deal, which Trump quit and Netanyahu opposes, aimed at keeping Tehran from nukes

Iranian news agency says president is likely to announce 'step-by-step plans' for 'reciprocal measures' on Wednesday

Defense official says Pentagon approved the deployments; US forces at sea and on land thought to be possible targets

Tehran's economic situation getting worse as countries fear losing American markets if they do business with Islamic Republic

Iranian president says US seeks to divide nation by cutting its foreign currency supply; 'They want us to be divided, to stand against each other'

Move allows Russia and European nations to continue work at nuclear sites without incurring US penalties; 2 waivers relating to heavy water and uranium enrichment not extended