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Technology of 1957
1st electric watch introduced, Lancaster Pa
3 B-52's set record for around-the-world flight, 45 hours 19 minutes
1st electric portable typewriter placed on sale (Syracuse New York)
1st submarine designed to fire guided missiles launched, Grayback
U.S. Surgeon General Leroy Burney connects smoking with lung cancer
1st rocket with nuclear warhead fired, Yucca Flat, Nevada
U.S.S.R. launches 1st intercontinental multistage ballistic missile
World longest suspension bridge opens in Mackinac Straits, Michigan
1st U.S. large scale nuclear power plant opens (Shippingport Penn)
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