TRACK AND FIELD PHOTOS

  • Kana Ichikawa, front center, pushes ahead in the women's 4x400 meters heat at the World Relays, Saturday, May 2, 2015, in Nassau, Bahamas. (AP Photo/Tim Aylen)

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  • Kana Ichikawa pushes ahead in the women's 4x400 meters heat at the World Relays, Saturday, May 2, 2015, in Nassau, Bahamas. (AP Photo/Tim Aylen)

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  • Sayaka Aoki surges ahead in the Women's 4x400 meters heats at the World Relays Saturday, May 2, 2015, in Nassau, Bahamas. (AP Photo/Tim Aylen)

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  • Sayaka Aoki takes the baton from Asami Chiba, back, in the Women's 4x400 meters heat at the World Relays Saturday, May 2, 2015, in Nassau, Bahamas. (AP Photo/Tim Aylen)

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  • Seika Aoyama pushes ahead in the Women's 4x400 meters heat at the World Relays Saturday, May 2, 2015, in Nassau, Bahamas. (AP Photo/Tim Aylen)

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  • Seika Aoyama launches off the blocks in the Women's 4x400 meters heat at the World Relays Saturday, May 2, 2015, in Nassau, Bahamas. (AP Photo/Tim Aylen)

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  • Seika Aoyama prepares herself before the start of the Women's 4x400 meters heats at the World Relays Saturday, May 2, 2015, in Nassau, Bahamas. (AP Photo/Tim Aylen)

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  • Kotaro Taniguchi, right, sprints to the finish line ahead of Justyn Warner in the Men's 4x100 meters heats at the World Relays Saturday, May 2, 2015, in Nassau, Bahamas. (AP Photo/Tim Aylen)

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  • Kotaro Taniguchi sprints to the finish line against Justyn Warner in the Men's 4x100 meters heats at the World Relays Saturday, May 2, 2015, in Nassau, Bahamas. (AP Photo/Tim Aylen)

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  • Kazuma Oseto smiles at the end of the Men's 4x100 meters heat at the World Relays Saturday, May 2, 2015, in Nassau, Bahamas. (AP Photo/Tim Aylen)

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