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"On June, 8 1959, an unmanned missile launched from a submarine delivered 3,000 pieces of U.S. mail to Mayport, Fla. As it turned out, that first test of \"missile mail\" was also the last. Lee Cowan reports."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.cbsnews.com/videos/almanac-missile-mail/>