TRACK AND FIELD PHOTOS

  • The Great Britain team with Ashleigh Nelson, Desiree Henry, Asha Philip and Anyika Onoura, from left to right, celebrates after the women's 4x100m relay race of the IAAF Diamond League international athletics meeting in the Letzigrund stadium in Zurich, Switzerland, Thursday, Aug. 28, 2014. (AP Photo/Keystone, Jean-Christophe Bott)

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  • The Great Britain team with Desiree Henry, Anyika Onoura, Asha Philip and Ashleigh Nelson, from left to right, celebrates after the women's 4x100m relay race of the IAAF Diamond League international athletics meeting in the Letzigrund stadium in Zurich, Switzerland, Thursday, Aug. 28, 2014. (AP Photo/Keystone, Jean-Christophe Bott)

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  • Dawn Harper-Nelson from USA celebrates after winning the 100m hurdles event at the IAAF Diamond League international athletics meeting in the Letzigrund stadium in Zurich, Switzerland, Thursday, Aug. 28, 2014. (AP Photo/Keystone, Ennio Leanza)

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  • Dawn Harper-Nelson from USA celebrates after winning the 100m hurdles event at the IAAF Diamond League international athletics meeting in the Letzigrund stadium in Zurich, Switzerland, Thursday, Aug. 28, 2014. (AP Photo/Keystone, Ennio Leanza)

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  • Dawn Harper-Nelson from USA celebrates after winning the 100m hurdles event at the IAAF Diamond League international athletics meeting in the Letzigrund stadium in Zurich, Switzerland, Thursday, Aug. 28, 2014. (AP Photo/Keystone, Ennio Leanza)

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  • Queen Harrison, left, from USA, falls next to Dawn Harper-Nelson from USA during the women's 100m hurdles race, of the IAAF Diamond League international athletics meeting in the Letzigrund stadium in Zurich, Switzerland, Thursday, Aug. 28, 2014. (AP Photo/Keystone, Jean-Christophe Bott)

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  • Shannon Rowbury, right, from USA runs on as Jennifer Simpson from USA, falls in the women's 1,500m race, during the IAAF Diamond League international athletics meeting in the Letzigrund stadium in Zurich, Switzerland, Thursday, Aug. 28, 2014. (AP Photo/Keystone, Steffen Schmidt)

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  • Shannon Rowbury, right, from USA runs on as Jennifer Simpson from USA, left, falls in the women's 1,500m race, during the IAAF Diamond League international athletics meeting in the Letzigrund stadium in Zurich, Switzerland, Thursday, Aug. 28, 2014. (AP Photo/Keystone, Steffen Schmidt)

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  • David Rudisha from Kenya reacts after the men's 800m race, during the IAAF Diamond League international athletics meeting in the Letzigrund stadium in Zurich, Switzerland, Thursday, Aug. 28, 2014. (AP Photo/Keystone, Jean-Christophe Bott)

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  • Nijel Amos from Botswana celebrates after winning the men's 800m race, during the IAAF Diamond League international athletics meeting in the Letzigrund stadium in Zurich, Switzerland, Thursday, Aug. 28, 2014. (AP Photo/Keystone, Steffen Schmidt)

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