The fourth episode of NucleCast features Dr. Stephen J. Cimbala, a Distinguished Professor of Political Science at Penn State Brandywine. He is the author of numerous works in the fields of national security studies, nuclear deterrence and arms control, and other topics. An award-winning Penn State teacher, Dr. Cimbala recently co-authored U.S. National Security (Sixth Edition) with John Allen Williams and the late Sam Sarkesian.