School children look at a photo exhibition about Japan's wartime invasion which is displayed at Marco Polo Bridge on the outskirts of Beijing July 6, 2007, on the eve of the 70th anniversary of Japan's full-scale invasion of China. The exhibit coincides with the 70th anniversary of the July 7, 1937 skirmish at the Marco Polo Bridge near Beijing, which sparked an all-out war between China and Japan. Ties between the neighbours have been strained by Tokyo's refusal to acknowledge atrocities committed by Japanese soldiers in the country between 1931 and 1945. [Reuters]

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