Snatching 'Casualties' From The Air -- The Hoverfly Helicopter ambulance flies off to the dressing station with a "Casualty" on the external stretcher. "Casualties" were "snatched up" by a Hadrian glider and picked up by a grating stretcher suspended from a helicopter during a "Casualty Evacuation Exercise" at the Royal Air Force Station, Brize Norton, Oxford today (Thursday). The exercise demonstrated modern methods of speedily recovering wounded from battle areas. January 20, 1949. (Photo by