James Martin Center for Nonproliferation Studies | 3,918 followers on LinkedIn. The largest nongovernmental organization devoted exclusively to research and training on WMD nonproliferation issues. | CNS strives to combat the spread of weapons of mass destruction (WMD) by training the next generation of nonproliferation specialists and disseminating timely information and analysis. It is the largest nongovernmental organization in the United States devoted exclusively to research and training on nonproliferation issues. It is located at the Middlebury Institute of International Studies at Monterey, a graduate school of Middlebury College, with offices in Washington, DC, and Vienna, Austria.