Workers clear away rubbish in the water one day before the demolition of the last cofferdam at Three Gorges Dam in Yichang, China's Hubei province, June 5, 2006. Workers are to blow up the massive temporary cofferdam in what state media called the 'world's toughest demolition job.' Some 192 tons of dynamite is being laid inside the 140-meter-high (153-foot-high) protective cofferdam so that it can be blown up on Tuesday. The cofferdam has been used since 2003 to hold water back during construction of the main wall of the Three Gorges [AP]

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