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This photograph taken from an aircraft shows an aerial view of Mount Everest (C) and The Himalayan mountain range, some 140kms (87 miles) north-east of Kathmandu on April 3, 2013, on the 80th anniversary of the first manned flight over Mount Everest, the world's tallest mountain.  This year is the 60th anniversary of the first summit of the 8848-metre peak.   Prakash Mathema/AFP/Getty
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