What are the most significant nuclear safety risks for Ukraine today?
How do U.S. and Chinese positions on nuclear deterrence, arms control, and security assurances differ in the context of Ukraine?
How effective has the IAEA been in ensuring nuclear security in Ukraine, and what obstacles does it face due to great-power competition?


Senior Director of the Nuclear Treat Initiative’s Nuclear Materials Security program

Senior Research Associate at Harvard Kennedy School Belfer Center

Research Associate at the James Martin Center for Nonproliferation Studies, Middlebury Institute of International Studies, Monterey

Research Fellow, Centre for International Security, Hertie School, Berlin