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Chris Gainor

Chris Gainor, a historian of technology, is the author of "Arrows to the Moon: Avro7;s Engineers and the Space Race," "Who Killed the Avro Arrow?," and "Canada in Space: The People and Stories behind Canada's Role in the Exploration of Space," A former NASA astronaut, Alfred Worden spent three days orbiting the moon alone during the "Apollo 15" lunar landing mission.