The first men to fly over Mount Everest did so in an unpressurized biplane

April 3, 1933The two planes fly towards Lhotse and Everest at 32,000 feet.Image: ullstein bild via Getty ImagesThough the 29,029-foot-high summit of Mount Everest was first conquered on foot by Tenzing Norway and Edmund Hillary in 1953, it was conquered by air two decades earlier.In April 1933, RAF squadron leader Douglas Douglas-Hamilton, otherwise known as Lord Clydesdale, led an ambitious attempt to fly over the summit of the world’s tallest mountain.With the financial backing of philan