Science: Open Secret

The famed Norden bombsight, perhaps the most closely guarded U.S. military secret of the war, last week had its first public showing. Anybody with 30¢ could have a look through it at Manhattan's Museum of Science and Industry (see cut), anybody at all could see it free behind a rope at a Wall Street War Bond show. But not even a spying engineer could learn much from this glimpse. The instrument, which contains some 2,000 parts and costs nearly $10,000, is so complex that, although a number of the sights have fallen into enemy...

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