Justin

 Usain St. Leo Bolt OJ, CD OLY (/ju:seIn/ born on 21 August, 1986), is a retired Jamaican sprinter. He is the only athlete to be awarded the Olympic 100 m title and the 200 m title at three consecutive Olympics (2008), 2012, 2016, (both in London). He won two gold medals during the relay 4x100. He became famous worldwide for his double sprint win in world record time during the 2008 Beijing Olympics and was the first time a person to hold both records since fully automatic time became mandatory. Gold medals for relays of 100 metres medals from 2009 until 2015 With the exception of the false start of 100 meters in 2011. Bolt is the most successful male athlete from the World Championships. Bolt was the only male athlete to be awarded four World Championship titles at 200m. He also holds the 100m world record at 3.0 seconds. This is the best improvement since the introduction of electronic timing. Bolt broke the world record of 200 meters twice.