Sam J. Tangredi is the Leidos Chair of Future Warfare Studies and professor of national, naval, and maritime strategy at the U.S. Naval War College. A U.S. Naval Academy and Naval Postgraduate School graduate, he earned a PhD in international relations from the University of Southern California. He served a thirty-year naval career as a surface warfare officer and as a strategic planner and leader of strategic planning. He is author of Anti-Access Warfare: Countering A2/AD Strategies.