John Warden is a research assistant at CSIS, where he works with the Defense and National Security Group and the Project on Nuclear Issues (PONI). After receiving a B.A. from Northwestern University, he joined CSIS as a recipient of the William J. Taylor debate internship. He leads a number of PONI initiatives including International Outreach, the Next Generation Working Group, and PONI’s Essay Contest and also coordinates the CSIS U.S.-Japan-South Korea Track II Nuclear Dialogues. He previously worked on the project staff for Exploring the Nuclear Posture Implications of Extended Deterrence and Assurance, as well as Technical Challenges Associated With the New U.S. Nuclear Agenda and has been a frequent contributor to the PONI Debates the Issues blog.