Usain Bolt was in the 2008 Olympics.
The 2008 Olympics was his international debut over 100 m ; he had earlier won numerous 200 m medals -LRB- including 2007 World Championship silver -RRB- and holds the world under-20 and world under-18 records for the event .	100 m	2015 World Championships in Athletics  Men's 100 metres	200 m	200 metres at the Olympics	2007 World Championship	2007 World Championships in Athletics	world under-20	List of world junior records in athletics	world under-18 records	List of world youth bests in athletics
