Royal Air Force Lieutenant David McIntyre and the Scottish Marquess of Clydesdale, flying two open-cockpit Westland aircraft, completed the first overflight and aerial photographic survey of Mount Everest on April 3, 1933. The British Mount Everest team, depicted here in a painting by Ron Weil, battled extreme cold and high winds as they photographed the previously unknown crest of the 29,028-foot peak.