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 A high school student practices how to put on a gas mask during a nuclear disaster drill in Shijiazhuang, Hebei province, on July 8, 2013. [Photo/CFP]  | 
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 Bystanders watch a duck-and-cover drill designed to teach people how to deal with a nuclear emergency in Shijiazhuang, Hebei province, on July 8, 2013. [Photo/CFP]  | 
