
Germany's Rico Freimuth celebrates after setting his personal best in the pole vault of the decathlon at the World Athletics Championships in the Luzhniki stadium in Moscow, Russia, Sunday, Aug. 11, 2013. (AP Photo/Matt Dunham)
Matt Dunham/AP

Brazil's Augusto De Oliveira reacts after clearing the bar in the men's pole vault final at the World Athletics Championships in the Luzhniki stadium in Moscow, Russia, Monday, Aug. 12, 2013. (AP Photo/Ivan Sekretarev)
Ivan Sekretarev/ASSOCIATED PRESS

Bahamas' Chris Brown looks at the timing board after a men's 400-meter heat at the World Athletics Championships in the Luzhniki stadium in Moscow, Russia, Sunday, Aug. 11, 2013. (AP Photo/Martin Meissner)
Martin Meissner/AP

United States' David Oliver reacts as he wins the men's 110-meter hurdles final at the World Athletics Championships in the Luzhniki stadium in Moscow, Russia, Monday, Aug. 12, 2013. (AP Photo/Anja Niedringhaus)
Anja Niedringhaus/ASSOCIATED PRESS

Russia's Ilya Shkurenev celebrates after competing in the pole vault of the decathlon at the World Athletics Championships in the Luzhniki stadium in Moscow, Russia, Sunday, Aug. 11, 2013. (AP Photo/David J. Phillip)
David J. Phillip/AP

Venezuela's Jose Melendez reacts after a men's 400-meter heat at the World Athletics Championships in the Luzhniki stadium in Moscow, Russia, Sunday, Aug. 11, 2013. (AP Photo/Anja Niedringhaus)
Anja Niedringhaus/ASSOCIATED PRESS

United States' LaShawn Merritt gestures after a men's 400-meter heat at the World Athletics Championships in the Luzhniki stadium in Moscow, Russia, Sunday, Aug. 11, 2013. (AP Photo/Martin Meissner)
Martin Meissner/AP

Germany's Malte Mohr reacts after clearing the bar in an attempt in the men's pole vault final at the World Athletics Championships in the Luzhniki stadium in Moscow, Russia, Monday, Aug. 12, 2013. (AP Photo/Ivan Sekretarev)
Ivan Sekretarev/ASSOCIATED PRESS

Belgium's Thomas Van Der Plaetsen reacts after taking a jump in the men's high jump decathlon at the World Athletics Championships in the Luzhniki stadium in Moscow, Russia, Saturday, Aug. 10, 2013. (AP Photo/Ivan Sekretarev)
Ivan Sekretarev/AP

Jamaica's Usain Bolt celebrates 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. (AP Photo/Anja Niedringhaus)
Anja Niedringhaus/ASSOCIATED PRESS