There are more than 15,000 nuclear weapons in existence today – down from more than 70,000 in 1986. Though the threat of a nation using one of these catastropic weapons has lowered, chances of an accident are still considerable. Eric Schlosser spent six years investigating the current US nuclear arsenal – and its command and control system – to get a deeper sense of how nuclear risks in the post-Cold War era are mitigated. In this video, Schlosser is interviewed about his research by MacArthur Foundation Nuclear Challenges Director Emma Belcher at a recent event at the Chicago Council on Global Affairs.