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NPR's Leila Fadel talks Mariana Budjeryn, a Ukrainian and a nuclear expert at Harvard's Belfer Center, about the dangers of Russia seizing control of Ukraine's nuclear power plants.

Mariana Budjeryn, Research Associate, Project on Managing the Atom, discusses the risks of Russian attacks near nuclear facilities in Ukraine on CNN Newsroom Live, March 6, 2022.

Mariana Budjeryn, Research Associate, Project on Managing the Atom, shares details of Russia's shelling of the Zaporizhzhia Nuclear Power Plant in Ukraine on CNN Newsroom.

Mariana Budjeryn, Research Associate, Project on Managing the Atom, shares details of Russia's shelling of the Zaporizhzhia Nuclear Power Plant in Ukraine on CNN International's Connect the World with Becky Anderson.

Russian forces have seized the largest nuclear plant in Europe, Ukrainian authorities say. It comes hours after a fire broke out at the Zaporizhzhia plant following a Russian attack. The fire has since been extinguished, and officials say the site is safe but Western powers have condemned Russia for what they called a "horrific" and "reckless" act, and Ukrainian President Zelensky says the attack could have caused "six Chernobyls". Mariana Budjeryn is a Research Associate with the Project on Managing the Atom  at the Harvard Kennedy School Belfer Center. She says that as far as we know, the shelling hit a number of facilities but that the flow of electricity must be kept constant to allow the fuel to keep cooling. She goes on to say that reactors are protected to withstand a certain level of impact, but none have been designed to withstand sustained artillery fire. She says there is concern that at this level of hostilities, there is a risk of a serious nuclear accident, or one that is planned to stop the war quickly and on Russia conditions. "You can't just hit a switch on a nuclear reactor - there are still a number of procedures that have to be followed quite closely to keep that reactor safe."

Following the recent Biden administration announcement that the U.S. would join European nations in seeking to restore the 2015 Iran nuclear deal, we asked several of our Iran experts for their thoughts on the next steps: What should the U.S. goal be for a renewed Iran deal and what suggestions do you have for getting there? Matthew Bunn, Mahsa Rouhi, Sahar Nowrouzzadeh, and William Tobey shared their thoughts.

More than 70 nuclear nonproliferation specialists, including Matthew Bunn, signed a statement in support of U.S. reentry into the Iran Nuclear Deal.