Nearly three months after a fragile ceasefire paused the open conflict between the US-Israeli alliance and Iran that ignited on February 28, top Pakistani military commander Asim Munir touched down in Tehran on Friday, stepping into the most high-profile mediation effort to date to lock in a permanent end to the devastating regional war. As Islamabad holds the official mediator role for talks between the two adversarial sides, the visit comes as Iran evaluates a new American peace proposal that has sparked cautious optimism from Washington — even as Iranian officials warn deep divisions remain far from resolved.