He retired from the U.S. Marine Corps in 2011 as a Colonel after 25 years active duty. He holds a B.S. from the University of Central Missouri, an M.S. from Boston University, and an M.A. from the College of Naval Warfare.Carey W. Walker is an assistant professor in the Department of Command and Leadership at the Command and General Staff College, Fort Leavenworth, KS. He retired from the U.S. Army in 2004 as a Lieutenant Colonel after serving 24 years in various infantry and staff assignments in the U.S. and overseas. He holds a B.A. from Rutgers University and an M.S. from Kansas State University.