Countdown goes behind the scenes with four of the world's best athletes. Light heavyweight king Jon Jones braces for the most challenging - and personal - fight of his career against Daniel Cormier, a former Olympic wrestler with an undefeated record.
Video Source: https://www.youtube.com/watch?v=S0v2vUbV158
Video Source: https://www.youtube.com/watch?v=S0v2vUbV158
