World Athletics Championships concludes in Moscow
People celebrate the closing ceremony at the World Athletics Championships in the Luzhniki stadium in Moscow, Aug. 18, 2013. (Xinhua/Jia Yuchen)
International Association of Athletics Federations (IAAF) President Lamine Diack (L) hands over the flag to Shen Chunde, vice director of the athletics section of China's State General Sports Administration during the closing ceremony of the World Athletics Championships in the Luzhniki stadium in Moscow, Aug. 18, 2013. (Xinhua/Dai Tianfang)