At 308 metres (1, 018 feet) with 72 habitable floors above London, The Shard is the tallest building in Europe at a cost of 435 million. Built from 2009 and opened last June 2012, it has 11, 000 windows that need constant attention, cleaning and maintaining. This army of brave men abseil twice a week to keep The Shard spotless. Watch it in HD to see how it s
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