“Negotiations on the outstanding issues, especially on Iran’s nuclear program, will be long and difficult,” one expert said.A man flashes the victory sign in front of a billboard depicting the late Iranian leader Ayatollah Ali Khamenei and Iranian Supreme Leader Ayatollah Mojtaba Khamenei in Beirut, Lebanon on Monday.Anwar Amro / AFP via Getty ImagesJune 15, 2026, 12:24 PM EDTBy Phil McCausland and Mariel FerragamoThis article was originally published on CFR.org and updated by NBC News.President Donald Trump and Iranian officials have announced an agreement to end fighting and reopen the Strait of Hormuz. A signing was scheduled for Friday in Switzerland, according to Pakistani Prime Minister Shehbaz Sharif, who has acted as a mediator between Tehran and Washington. Just a moment.We are getting your experience ready.