who is the fastest runner
Usain St. Leo Bolt, (/ËjuËseÉªn/ ; born 21 August 1986) is a Jamaican sprinter. Regarded as the fastest person ever, he is the first man to hold both the 100 metres and 200 metres world records since fully automatic time measurements became mandatory in 1977. Along with his teammates, he also set the world record in the 4Ã100 metres relay.