How far do atomic bombs spread their radioactive end-products? This question has never been answered conclusively. Except for a few negative statements to soothe the nervous public, the Manhattan Project has kept its observations secret. But last fortnight some scattered facts came out:
Two and a half days after the atomic bomb went off in the New Mexico desert last summer, the air over Maryland, 1,700 miles away, had nearly twice its normal radioactivity. The U.S. Coast and Geodetic Survey noted a similar phenomenon at Tucson, Ariz. But the Eastman Kodak Co. was the first to trace, and announce, the actual spread...
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