The fastest runner in the world happens to train with his stiffest competition, who also happens to be his friend and teammate. Usain Bolt of Jamaica will compete against fellow countryman Yohan Blake at the 2012 Olympics in London starting on Friday. They will compete in the men's 100m, 200m, and 4x100m relays.
NBC's Lester Holt traveled to Bolt's homeland to meet the king of the track for a Rock Center report which originally aired April 18, 2012. READ MORE >