Duan Jinsheng (L), 83, and Cai Xiaoyu (R), a student of Renmin University, mourn during a silent tribute in Tian'anmen Square in central Beijing, capital of China, May 19, 2008. Millions of people in China and overseas observed three minutes silence at 2:28 pm Monday to mourn thousands of people killed in an earthquake which hit the nation's southwestern regions a week ago. Across the country, air raid sirens, cars, trains and ship horns wailed in grief as the people fell silent. (Xinhua)

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