The expiration of New Start on February 5 marks the end of over half a century of bilateral efforts to advance strategic arms control. On February 3, the Stimson Center and the Oppenheimer Project convened leading nuclear experts from the US and Russia to imagine what comes next. The American speakers were Scott Sagan (Stanford University), Rita Guenther (The National Academies), and Matthew Bunn (Harvard Kennedy School). The Russian side was represented by Feodor Voitolovsky (Institute of World Economy and International Relations), Dmitry Stefanovich (Institute of World Economy and International Relations), and Anton Khlopkov (Center for Energy and Security Studies). This episode was recorded as a live online event. *The Trialogue Podcast is hosted by the Stimson Center and produced by University FM.