Bolt streaks to new world record at close of world championships

Jamaican athlete scorched to 200m glory in 19.40 seconds - the fourth fastest time in history
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Usain Bolt of Jamaica celebrates claiming gold in the men's 200 metres final during day eight of the 13th IAAF World Athletics Championships at the Daegu Stadium on September 3, 2011 in Daegu, South Korea. (Getty Images)
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(L-R) Yohan Blake, Usain Bolt and Nesta Carter of Jamaica celebrate victory and a new world record in the men's 4x100 metres relay final during day nine of 13th IAAF World Athletics Championships at Daegu Stadium on September 4, 2011 in Daegu, South Korea (Getty Images)
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(L-R) Nesta Carter, Michael Frater, Yohan Blake and Usain Bolt of Jamaica celebrate victory and a new world record in the men's 4x100 metres relay final during day nine of 13th IAAF World Athletics Championships (Getty Images)
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Usain Bolt of Jamaica celebrates victory and a new world record after crossing the finish line in the men's 4x100 metres relay final during day nine of 13th IAAF World Athletics Championships at Daegu Stadium (Getty Images)
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Tatyana Lysenko of Russia reacts during the women's hammer throw final during day nine of the 13th IAAF World Athletics Championships at the Daegu Stadium on September 4, 2011 in Daegu, South Korea (Getty Images)
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Phillips Idowu of Great Britain competes in the men's triple jump final during day nine of 13th IAAF World Athletics Championships at Daegu Stadium on September 4, 2011 in Daegu, South Korea. (Getty Images)
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A young fan looks on as ticker tape falls during the closing ceremony during day nine of 13th IAAF World Athletics Championships at Daegu Stadium on September 4, 2011 in Daegu, South Korea. (Getty Images)
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Ngonidzashe Makusha of Zimbabwe competes during the men's long jump final during day seven of 13th IAAF World Athletics Championships at Daegu Stadium on September 2, 2011 in Daegu, South Korea. (Getty Images)
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(L-R) Richard Kipkemboi Mateelong of Kenya, Hamid Ezzine of Morocco and Roba Gari of Ethiopia compete in the men's 3000 metres steeplechase final during day six of the 13th IAAF World Athletics Championships at the Daegu Stadium on September 1, 2011 in Daegu, South Korea. (Getty Images)
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Carmelita Jeter of United States celebrates after winning the women's 100 metres final during day three of the 13th IAAF World Athletics Championships at the Daegu Stadium on August 29, 2011 in Daegu, South Korea. (Getty Images)
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Ignisious Gaisah of Ghana competes in the men's long jump qualification round during day six of the 13th IAAF World Athletics Championships at the Daegu Stadium on September 1, 2011 in Daegu, South Korea. (Getty Images)
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Athletes compete in the women's 20km race walk during day five of the 13th IAAF World Athletics Championships in Daegu city centre on August 31, 2011 in Daegu, South Korea. (Getty Images)
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Pawel Wojciechowski of Poland celebrates winning the men's pole vault final with the official mascot Sarbi during day three of the 13th IAAF World Athletics Championships at the Daegu Stadium on August 29, 2011 in Daegu, South Korea. (Getty Images)
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Young spectators cheer on the athletes during day four of 13th IAAF World Athletics Championships at Daegu Stadium on August 30, 2011 in Daegu, South Korea. (Getty Images)
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Gold medalist Yohan Blake of Jamaica celebrates on the podium with his medal for the men's 100 metres during day three of 13th IAAF World Athletics Championships at the Daegu Stadium on August 29, 2011 in Daegu, South Korea. (Getty Images)
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(L-R) Jorge Paula of Portugal, L.J. van Zyl of South Africa, Kerron Clement of United States, Felix Sanchez of Dominican Republic and Isa Phillips of Jamaica compete in the men's 400 metres hurdles heats during day three of the 13th IAAF World Athletics Championships at the Daegu Stadium on August 29, 2011 in Daegu, South Korea. (Getty Images)
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Abubaker Ali Kamal of Qatar jumps into the water during the men's 3000 metres steeplechase heats during day three of the 13th IAAF World Athletics Championships at the Daegu Stadium on August 29, 2011 in Daegu, South Korea. (Getty Images)
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Inika McPherson of United States looks on during the women's high jump qualification round during day six of the 13th IAAF World Athletics Championships at the Daegu Stadium on September 1, 2011 in Daegu, South Korea. (Getty Images)
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Tetiana Petlyuk of Ukraine falls during the women's 200 metres heats during day six of the 13th IAAF World Athletics Championships at the Daegu Stadium on September 1, 2011 in Daegu, South Korea. (Getty Images)
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Jason Richardson (L) of United States congratulates Carmelita Jeter of United States afer she won the women's 100 metres final during day three of the 13th IAAF World Athletics Championships at the Daegu Stadium on August 29, 2011 in Daegu, South Korea. (Getty Images)
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Jessica Ennis of Great Britain competes in the long jump in the women's heptathlon during day four of the 13th IAAF World Athletics Championships at the Daegu Stadium on August 30, 2011 in Daegu, South Korea. (Getty Images)
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(R-L) Kelly-Ann Baptiste of Trinidad and Tobago, Carmelita Jeter of United States and Veronica Campbell-Brown of Jamaica celebrate after the women's 100 metres final during day three of the 13th IAAF World Athletics Championships at the Daegu Stadium on August 29, 2011 in Daegu, South Korea. (Getty Images)
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Damar Forbes of Jamaica competes in the men's long jump qualification round behind two judges during day six of the 13th IAAF World Athletics Championships at the Daegu Stadium on September 1, 2011 in Daegu, South Korea. (Getty Images)