Tom Nichols is Professor of National Security Affairs at the US Naval War College, an adjunct professor at the Harvard Extension School, and a former aide in the U.S. Senate. He is also the author of several works on foreign policy and international security affairs, including The Sacred Cause, No Use: Nuclear Weapons and U.S. National Security, Eve of Destruction: The Coming Age of Preventive War, and The Russian Presidency. He is also a five-time undefeated Jeopardy! champion, and as one of the all-time top players of the game, he was invited back to play in the 2005 Ultimate Tournament of Champions.