Technicians work near a damaged subway train after a collision in Shanghai December 22, 2009. A pivotal subway line in Shanghai was shut down early Tuesday because of a system failure and subsequent collision of two trains, Xinhua News Agency reported.[Agencies] ![Shanghai subway resumes operation after collision](http://www.chinadaily.com.cn/china/images/attachement/gif/site1/20091222/0013729e45180c9acbfe2e.gif)
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