history of Usain bolt

Usain St. Leo Bolt,  (nicknamed  Lightning Bolt, pronounced born 21 August 1986), is a Jamaican sprinter and a three-time World and Olympic gold medalist. He is the world record and olympic record holder in the 100 metres, the 200 metres and (along with his teammates) the 4x 100 metres. He is the reigning World and Olympic champion in these three events.
Bolt distinguished himself with a 200 m gold medal at the 200 world junior champion, making him the competition's youngest-ever gold medalist. In 2004, at the CARIFTA games, he became the first junior sprinter to run the 200 m in under 20 seconds with a time of 19.93 s, breaking the previous world record junior held by Roy Martin by two-tenths of a second. He turned professional in 2004, and although he competed at the 2004 olympic, he missed most of the next two seasons due to injuries. In 2007, he surpassed Don quarrisse's 200 m Jamaican record with a run of 19.75 s.
His 2008  season  began with his first world record performance—a 100 m world record of 9.72 s—and culminated in world and olympic record in both the 100 m and 200 m events at the olympic beijing. He ran 9.69 s for the 100 m and 19.30 s in the 200 m, and also set a 4×100 m relay record of 37.10 s with the Jamaican team. This made him the first man to win three sprinting events at a single Olympics since Carl Lewis in 1984, and the first man to set world records in all three at a single Olympics. The following year he further lowered his own 100 m and 200 m world records to 9.58 s and 19.19 s respectively at the 2009 champion world This made him the first man to hold both the 100 and 200 m world and Olympic titles at the same time.
His 2009 record breaking margin over 100 m is the highest since the start of digital time measurements. His achievements in sprinting have earned him the media nickname "Lightning Bolt", and award in IIAF.