Mr. Ralph M. Erwin, Senior Geospatial Intelligence Officer, led the discussion on the roles and missions of the National Geospatial-Intelligence Agency (NGA). This was the second presentation of the school year of the "Inter-Agency Brown-Bag Lecture Series" co-hosted by the U.S. Army Command and General Staff School and the Simons Center for Interagency Cooperation on Sept. 18, 2017 at the Lewis and Clark Center, Fort Leavenworth, KS. Mr. Erwin is the Senior Geospatial Intelligence Officer assigned by the Army National Geospatial-Intelligence Agency (NGA) Support Team to be the NGA Liaison to the US Army Training and Doctrine Command (TRADOC) and the Combined Arms Center (CAC) at Fort Leavenworth, Kansas. The NGA is both a combat support agency under the Department of Defense and an intelligence agency as part of the United States' intelligence community. (U.S. Army photo by Dan Neal)