The United States and Iran clashed over Tehran’s nuclear programme as a review of the treaty meant to prevent the spread of atomic weapons got underway on Monday (April 27, 2026) at the United Nations, a confrontation almost certain to be repeated during the monthlong meeting.

At issue was the election of Iran as one of 34 Vice-Presidents of the conference, where 191 parties to the Nuclear Nonproliferation Treaty are reviewing its implementation as they have done every five years since it took effect in 1970.