Balance of Power

Iran in Mourning Is Still a Nuclear Headache

People mourn the death of Iranian President Ebrahim Raisi in Tehran on May 20.

Photographer: Fatemeh Bahrami/Anadolu/Getty Images

Welcome to Balance of Power, bringing you the latest in global politics. If you haven’t yet, sign up here.

A tragedy for Iran’s hardline clerics hasn’t caused its nuclear engineers to miss a step.