The Project on Nuclear Issues 2013 conference series included events at Northrop Grumman in May, Sandia National Laboratory in July, and CSIS in December, before concluding with a Capstone Conference at Offutt Air Force Base, home of the U.S. Strategic Command, in March 2014. The papers included in this volume are a collection of some of the presentations delivered at the Capstone Conference. Spanning a wide range of technical and policy issues, these selected papers hope to further discussion in their respective areas, as well as contribute to the success of the greater nuclear community.