Usain Bolt wins gold again in men’s 100-meter at World Athletics Championships

Jamaica’s Usain Bolt celebrates after winning gold in the Men’s 100-meter final at the World Athletics Championships in the Luzhniki stadium in Moscow, Russia, Sunday, Aug. 11, 2013.

Jamaica’s Usain Bolt, center, starts in the men’s 100-meter final at the World Athletics Championships in the Luzhniki stadium in Moscow, Russia, Sunday, Aug. 11, 2013.

Ethiopia’s Tirunesh Dibaba competes to win the women’s 10000-meter final at the World Athletics Championships in the Luzhniki stadium in Moscow, Russia, Sunday, Aug. 11, 2013.

Winner Ashton Eaton of the United States, right, is congratulated by second placed Pascal Behrenbruch following the men’s 1500-meter decathlon at the World Athletics Championships in the Luzhniki stadium in Moscow, Russia, Sunday, Aug. 11, 2013.

Germany’s Michael Schrader competes in the men’s discus throw of the decathlon at the World Athletics Championships in the Luzhniki stadium in Moscow, Russia, Sunday, Aug. 11, 2013. <AP/NEWSis>