In a landmark speech in Prague in April 2009, President Obama laid out a bold agenda to move toward a nuclear-free world. Over the next seven years, his Administration reached a treaty with Russia to reduce strategic arm stockpiles, convened international summits to secure nuclear materials against transfer or theft, and concluded an historic nuclear agreement with Iran. But some developments were less encouraging: arms control with Russia stalled; China, Pakistan, and North Korea significantly increased the size of their arsenals; and the rise of ISIS accentuated the threat of WMD terrorism. Against this evolving backdrop, the United States is refurbishing its nuclear weapons— what critics characterize as a destabilizing move toward smaller, more precise weapons that would be tempting to use in a crisis.

On the eve of the Nuclear Security Summit and the Prague speech’s anniversary, join us for a National Conversation with top experts in arms control, taking stock of the Administration’s progress toward its lofty arms control goals.