Usaun Bolt has won the men's 200m final in a new world record time of 19.30. He is the first man since Carl Lewis to win both the 100 and 200 titles at the olympics. He is also the only athlete to break world records in both distances at a single olympics. Bolt, who casually shaved 0.03 seconds off his own record in winning the 100 metres title in sensational style on Saturday, clocked 19.30secs to break Michael Johnson's 12-year-old record of 19.32s. The 21-year-old, who turns 22 tomorrow, made a brilliant start and was already well clear of the field coming into the straight. But unlike the 100m final, where he began celebrating well before the line, this time he sprinted through the tape to initially stop the clock at 19.31s, a time that was swiftly rounded down to 19.30s. Churandy Martina, of the Dutch Antilles, took silver in 19.82. American Wallace Spearmon crossed the line in third place in 19.95 but was disqualified for running out of his lane and team-mate Shawn Crawford, who ran 19.96 was promoted to the bronze medal. Britain's Christian Malcolm finished seventh in 20.40. When Bolt set off on his lap of honour 'happy birthday' rang out over the tannoy. USAIN BOLT FACTFILE 1986: Born August 21 in Trelawny, Jamaica. 2002: At the age of 15 Bolt wins gold in the 200m and silver in both the 4x100m and 4x400m relays at the 2002 World Junior Championships in Kingston. 2003: Wins gold in the 200m at World Youth Championships in Sh ...