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BIRMINGHAM, ENGLAND - FEBRUARY 18: Asafa Powell of Jamaica runs during his 60 metres heat during the Aviva Grand Pix at the NIA Arena on February 18, 2012 in Birmingham, England.

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BIRMINGHAM, ENGLAND - FEBRUARY 18: Lerone Clarke of Jamaica beats Asafa Powell of Jamaica to the win the 60 metres final during the Aviva Grand Pix at the NIA Arena on February 18, 2012 in Birmingham, England.

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Jamaica's Lerone Clarke (L) crosses the finish line ahead of Nesta Carter (C) and Asafa Powell (R) both from Jamaica, during the men's 60 meter final race at the Aviva Grand Prix athletics meeting, held in the National Indoor Arena in Birmingham on February 18, 2012.

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Jamaican sprinter Asafa Powell (2nd L) on his way to victory over USA's Trell Kimmons (L) and Saint Kitts & Nevis' Kim Collins (R) in a heat of the Men's 60m at the Aviva Grand Prix at The National Indoor Arena in Birmingham on February 18, 2012.

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Jamaican sprinter Asafa Powell on his way to victory in a heat of the Men's 60m at the Aviva Grand Prix at The National Indoor Arena in Birmingham on February 18, 2012.

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Asafa Powell of Jamaica holds his Athlete of the Meet trophy at the US Open Track and Field meet at Madison Square Garden in New York, January 28, 2012.

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NEW YORK, NY - JANUARY 28: Asafa Powell of Jamaica (L) crosses the finish line on his way to victory in the Men's 50 Meter Dash at the US Open track and field event at Madison Square Garden on January 28, 2012 in New York City.

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Asafa Powell, of Jamaica, tosses a towel to the crowd after he won the 50 meter dash at the US Open Track and Field meet at Madison Square Garden in New York, January 28, 2012. REUTER/Ray Stubblebine.

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Asafa Powell, of Jamaica, crosses the finish line of the 50 meter dash to win ahead of Nesta Carter (hidden), of the U.S. and Justin Gatlin (R), of Jamaica, at the US Open Track and Field meet at Madison Square Garden in New York, January 28, 2012.

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NEW YORK, NY - JANUARY 28: Asafa Powell of Jamaica celebrates winning the Men's 50 Meter Dash at the US Open track and field event at Madison Square Garden on January 28, 2012 in New York City.

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Asafa Powell, of Jamaica, reacts after winning the men's 50-meter dash in the U.S. Open Indoor athletic meet on Saturday, Jan. 28, 2012, in New York. Powell won the race with a time of 5.64.

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Asafa Powell, center, of Jamaica, wins the men's 50-meter dash with a time of 5.64 at the U.S. Open Indoor athletic meet on Saturday, Jan. 28, 2012, in New York.

AP Photo 3 weeks ago

Asafa Powell (3), of Jamaica, runs on his way to winning the men's 50-meter dash in 5:64 in the U.S. Open Indoor athletic meet on Saturday, Jan. 28, 2012, in New York. Finishing behind Powell are, from left to right, Kimmari Roach, of Jamaica in 5.74; Justin Gatlin in 5:71; Nesta...

AP Photo 3 weeks ago

Asafa Powell, center, of Jamaica, wins the men's 50-meter dash in 5:64 in the U.S. Open Indoor athletic meet on Saturday, Jan. 28, 2012, in New York. Finishing behind Powell are, from left to right, Justin Gatlin, of United States, in 5:71; Nesta Carter, of Jamaica; in 5:67; Daniel...

AP Photo 3 weeks ago

Jamaican sprinter Asafa Powell speaks to reporters during a news conference in advance of the U.S. Open Track and Field Championships, Thursday, Jan. 26, 2012, in New York. The championships are scheduled for Saturday, Jan. 28, at New York's Madison Square Garden.

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Jamaican track and field athletes Nesta Carter, left, and Asafa Powell react during a news conference in advance of the U.S. Open Track and Field Championships, Thursday, Jan. 26, 2012, in New York. The championships are scheduled for Saturday, Jan. 28, at New York's Madison Square Garden.

Reuters Pictures 5 months ago

Athletes including Asafa Powell (C) of Jamaica and his compatriot Yohan Blake (R) compete in the men's 100 metres event at the IAAF Diamond League athletics meeting at Letzigrund stadium in Zurich September 8, 2011.

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Jamaica's Yohan Blake (R) runs during the men's 100m race ahead of country fellow Asafa Powell (L) and USA's Walter Dix (C) at the Diamond League series Weltklasse athletics meeting, on September 8, 2011, in Zurich. Blake won the race.

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Jamaica's Yohan Blake (R) and Asafa Powell (L) run during the men's 100m race at the Diamond League series Weltklasse athletics meeting on September 8, 2011, in Zurich.

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Jamaican athletes Nesta Carter (L), Yohan Blake (C) and Michael Frater (R) react as they refuse to answer a question regarding fellow sprinter Asafa Powell during a press conference by the Jamaica Athletics Administrative Association (JAAA) at a cultural hall in Daegu on August 25, 2011.

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Asafa Powell of Jamaica smiles during a training session for the IAAF Daegu 2011 World Championship in Daegu August 24, 2011.

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LONDON, ENGLAND - AUGUST 04: David Rudisha, Asafa Powell, Sally Pearson, David Oliver, Dayron Robles and Mo Farah poses for photographers befoe the Aviva London Grand Prix press Conference at Crystal Palace on August 4, 2011 in London, England.

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LONDON, ENGLAND - AUGUST 04: Asafa Powell speaks to the press during a Aviva London Grand Prix press Conference at Crystal Palace on August 4, 2011 in London, England.

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Jamaica's Asafa Powell (R) and Zimbabwe's Ngonidzashe Makusha (L) compete during the 100 m final of the Hungarian athletics Grand Prix on July 30, 2011. Powell won the event.

AP Photo 6 months ago

Asafa Powell, right, of Jamaica races to finish first in the men's 100m sprint at the Istvan Gyulai Memorial Hungarian Athletics Grand Prix 2011, in the Ferenc Puskas Stadium in Budapest, Hungary, Saturday, July 30, 2011. On the left is Ngonidzashe Makasura of Zimbabwe.