The head of the U.N.’s nuclear watchdog on Iran’s nuclear program

Rafael Grossi has served as the director general of the International Atomic Energy Agency, the United Nations’ nuclear watchdog, since 2019. Prior to that, Grossi held various positions related to nuclear safety and the non-proliferation of nuclear weapons. A veteran diplomat, he was also Argentina’s ambassador to Austria and the Argentine Representative to the IAEA and other international organizations.

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Grossi spoke to FRONTLINE’s Sebastian Walker on March 18 for our 2026 update of the documentary, “Strike on Iran: The Nuclear Question.” This interview has been edited for length and clarity. See a more complete description of our process here: https://to.pbs.org/4lVZKzA

This interview is being published as part of FRONTLINE’s Transparency Project, an effort to open up the source material behind our documentaries. Read more about this project here: https://www.pbs.org/wgbh/frontline/about-frontlines-transparency-project/

“Strike on Iran: The Nuclear Question” is available to watch here: https://www.youtube.com/watch?v=td5Iph8BFgE

Explore more of our extended interviews in this playlist: https://www.youtube.com/playlist?list=PL_pPc6-qR9ZzEepVsKZsT58XiLb38Tttr

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