Residents on the roof of a mosque who are taking refuge from flood waters are evacuated by a Army helicopter in Sanawa, a town located in the Muzaffar Ghar district of Pakistan's Punjab province August 5, 2010. So far, the floods have killed more than 1,600 people and officials said the toll was likely to climb. More than 4 million have also lost their livelihoods and homes.  REUTERS/Stringer (PAKISTAN - Tags: DISASTER ENVIRONMENT)
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