The leaders of Tae Kwon Do, an Olympic sport and one of the world s most popular martial arts, are fond of saying that their art is ancient and filled with old dynasties and superhuman feats. In fact, Tae Kwon Do is as full of lies as it is powerful techniques. From its rough beginnings in the Korean military 60 years ago, the art empowered individuals and nations, but its leaders too often hid the painful truths that led to that empowerment the gangsters, secret-service agents, and dictators who encouraged cheating, corruption, and murder. "A Killing Art: The Untold History of Tae Kwon Do"...