Best moments from World Athletics Championships

Ukraine's Hanna Melnychenko competes in the women's javelin throw qualification at the World Athletics Championships at the Luzhniki stadium in Moscow, Russia, Aug. 13, 2013.

Russia's Elena Lashmanova, right, and Russia's Anisya Kirdyapkina compete in the women's 20-kilometer race walk final, Aug. 13, 2013.

Mexico's Luis Rivera competes in the men's long jump qualification, Aug. 14, 2013.

Britain's Sophie Hitchon competes in the women's hammer throw qualification, Aug. 14, 2013.

Athletes exchange the baton during a handover as they compete in the men's 4x400-meter relay heat, Aug. 15, 2013.

Turkey's Fatih Avan competes in the men's javelin throw qualification, Aug. 15, 2013.

Russia's Yelena Isinbayeva celebrate winning gold in the women's pole vault final, Aug. 13, 2013.

Ukraine supporters cheer at the World Athletics Championships, Aug. 13, 2013.

France's Salim Sdiri competes in the men's long jump qualification, Aug. 14, 2013.

The United States' Inika Mcpherson competes in a women's high jump qualification, Aug. 15, 2013.

Athletes compete in a women's 5,000-meter heat, Aug. 14, 2013.

New Zealand's Quentin Rew cools down as he competes in the men's 50-kilometer race walk, Aug. 14, 2013.

Jamaica's Shelly-Ann Fraser-Pryce reacts as she wins the women's 100-meter final, Aug. 12, 2013.

Romania's Elena Mirela Lavric lies on the track after a women's 800-meter heat, Aug. 15, 2013.

Germany's David Storl competes in the men's shot put qualification, Aug. 15, 2013.

China's Li Jinzhe competes in the men's long jump qualification, Aug. 14, 2013.

South Africa's Godfrey Khotso Mokoena competes in the men's long jump qualification, Aug. 14, 2013.

Athletes compete in the women's 3000-meter steeplechase final, Aug. 13, 2013.

Ukraine's Hanna Melnychenko competes in the women's triple jump qualification, Aug. 13, 2013.

Greece's Niki Panetta competes in the women's triple jump qualification, Aug. 13, 2013.

Athletes compete in a women's 5000-meter heat, Aug. 14, 2013.

Russia's Yelena Isinbayeva waves the national flag as she celebrates winning the gold medal in the women's pole vault final, Aug. 13, 2013.

Italy's Jean-Jacques Nkouloukidi cools off as he competes in the men's 50 kilometer race walk, Aug. 14, 2013.

Israel's Hanna Knyazyeva-Minenko competes in the women's triple jump qualification, Aug. 13, 2013.

Czech Republic's Jirina Ptacnikova-Svobodova lands after an attempt in the women's pole vault final, Aug. 13, 2013.

Jamaica's Shelly-Ann Fraser-Pryce poses for photographers with her national flag as she celebrates after winning gold in the women's 100-meter final, Aug. 12, 2013.

Jamaica's Shelly-Ann Fraser-Pryce, second from left, looks at the timing board after winning the women's 100-meter final ahead of USA's Carmelita Jeter, left, USA's English Gardner, right, and USA's Alexandria Anderson, Aug. 12, 2013.

New Zealand's Valerie Adams competes in the women's shot put final, Aug. 12, 2013.

Jamaica's Shelly-Ann Fraser-Pryce competes in a women's 200-meter heat at the World Athletics Championships, Aug. 15, 2013.

The United States' Brad Walker competes in the men's pole vault final, Aug. 12, 2013.

Russia's Yelena Isinbayeva competes in the the women's pole vault final, Aug. 13, 2013.

France's Salim Sdiri competes in the men's long jump qualification, Aug. 14, 2013.

Kenya's Milcah Chemos Cheywa, center, competes to win the gold medal in the women's 3000-meter steeplechase final, Aug. 13, 2013.

Germany's Kathrin Klaas competes in the women's hammer throw qualification, Aug. 14, 2013.