Opening ceremony, World Athletics Championships, at the Bird’s Nest stadium, in Beijing. 開幕式, 世界田徑錦標賽, 鳥巢體育場

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Performers dance during the opening ceremony of the World Athletics Championships at the Bird’s Nest stadium in Beijing, Saturday, Aug. 22, 2015. (Wong Maye-E/Associated Press)

Participants wait to enter the arena for the opening ceremony of the World Athletics Championships at the Bird’s Nest stadium in Beijing, Saturday, Aug. 22, 2015. (Kin Cheung/Associated Press)
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