In the weeks since the U.S. and Israel began bombarding Iran, President Donald Trump repeatedly justified the strikes by claiming Iran had posed an imminent nuclear threat. But months earlier, in the wake of U.S. and Israeli strikes in June 2025, the message coming from Washington, D.C., was that Iran’s key nuclear facilities had been “obliterated.”

In this episode of The FRONTLINE Dispatch, host Raney Aronson-Rath speaks with filmmaker and correspondent Sebastian Walker about his recent interview with Rafael Grossi, the head of the United Nations’ nuclear watchdog, the International Atomic Energy Agency. Grossi says inspectors no longer have visibility into Iran’s nuclear program, and describes negotiations as “necessary” to “avoid this repetition of war scenarios and wars every nine months.”

Walker’s film with Adam Desiderio, Strike On Iran: The Nuclear Question, has been updated and expanded. Drawing on new reporting, satellite imagery analysis and interviews, the investigation with The Washington Post, Evident Media and Bellingcat examines the status of Iran’s nuclear program amid the second round of U.S.-Israeli military action in less than a year.

Strike on Iran: The Nuclear Question is available to stream now on FRONTLINE’s website, FRONTLINE’s YouTube channel, the PBS App and PBS Documentaries on Prime.

Watch Walker’s extended interview with Grossi on FRONTLINE’s YouTube channel, and read it on our website.