Sergeant David C. Beyerle distinguished himself by heroism involving voluntary risk of life while in flight over the high seas south of Halifax, Nova Scotia, Canada, on 12 Jun 1970.  On that date, Sergeant Beyerle, with complete disregard for his own safety, partially egressed from an inflight Canadian Helicopter in order to retrieve an aircrew member who had been drawn out of the cabin when a door on the aircraft suddenly opened.  Through his personal courage, prompt professional action and physical dexterity, he was able to prevent the man from falling to a certain death.  By his courageous action and humanitarian regard for his fellowman, Sergeant Beyerle has reflected great credit upon himself and the United States Air Force.