Tom Nichols is a U.S. Naval War College professor, and an adjunct at the U.S. Air Force School of Strategic Force Studies and the Harvard Extension School. He is a specialist on international security affairs, including U.S.-Russia relations, nuclear strategy and NATO issues. A nationally-known commentator on U.S. politics and national security, he is a columnist for USA Today and a contributing writer at The Atlantic. He served as a staff member in the U.S. Senate and has held fellowships at CSIS and the Harvard Kennedy School. He has taught at Dartmouth, La Salle and Georgetown. He is also a five-time undefeated 'Jeopardy!' champion.