Sam Chan (R), 34, and a colleague work on the bamboo scaffolding on the 50th floor of the Far East Finance Center in Hong Kong September 9, 2006. In Hong Kong, about 4,000 scaffolding workers spend their working lives dangling outside some of the world's tallest buildings, making repairs to skyscrapers in one of Hong Kong's most vertiginous and challenging blue-collar jobs. [Reuters]

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