Just about everyone knows who Mike Tyson is. Undisputed heavyweight champion of the world. Prodigious, powerful boxer who won 50 of his 58 fights -- 44 by knockout. Lesser known is how Tyson became one of the fiercest fighters of all time. The absolutely improbable tale began when a troubled young kid met a cantankerous old trainer at a small boxing gym in the sleepy town of Catskill, New York. Cus D'Amato would change the whole trajectory of Tyson's life, teaching him everything he knew about success in and out of the ring, before dying just a year before his protege became the youngest heavyweight champion of the world at the age of 20.