Fireworks explode near the Luzhniki stadium in Moscow, Russia, Saturday, Aug. 10, 2013, during the opening ceremony for the World Athletics Championships. The event runs through till Aug. 18, 2013. (AP Photo/Alexander Zemlianichenko)
From left: India's Chandan Singh, Greece's Alexandros Papamihail, and Poland's Rafal Augustyn cool off as they compete in the men's 20km race walk. Photo: AP
Germany's Michael Schrader celebrates setting a new personal best for the javelin throw for the decathlon. Photo: AP
Canada's Damian Warner competes in the pole vault of the decathlon. Photo: AP
Ivory Coast's Murielle Ahoure blows a kiss to television cameras before competing in a men's 100-meter heat. Photo: AP
United States' Carmelita Jeter (left) and Nigeria's Stephanie Kalu compete in a women's 100-meter heat. Photo: AP
From left: Denmark's Nick Ekelund-Arenander, United States' Tony Mcquay, Costa Rica's Nery Brenes, and Cuba's Yoandys Lescay compete in a men's 400-meter heat. Photo: AP
United States' Aries Merritt (right) and Cuba's Orlando Ortega compete in a men's 110-meter heat. Photo: AP