Justin

 Usain St. Leo Bolt OJ, CD OLY (/ju:seIn/ born 21 August 1986) is a retired Jamaican sprinter. He is the sole athlete to win the Olympic 100 m title as well as the 200 m title at three different Olympics (2008) in 2012, 2008 and 2016 (both in London). He took home two gold medals during the 4x100 relay. He became famous worldwide for his double sprint win in world record time during the 2008 Beijing Olympics and made him the first athlete who held both records after fully automatic time became mandatory. Relay gold medals between 2009 and 2015 With the exception of a 100 m false start in 2011. Bolt is the most successful male athlete of the World Championships. Bolt is the only athlete to have won four World Championship titles in the 200 meters and is one of the top performers in the 100m, winning three titles.Bolt made improvements on his second 100 m world record of 9.69 by a time of 9.58 seconds in 2009. - the biggest improvement since the introduction of electronic timing. Bolt has two times broken the 200m world record and set it in 2009.