NSA
RADIO TRAFFIC ANALYSIS
DOCID: 3860741 UNCLASSIFIED The Origination and Evolution of Radio Traffic Analysis: World War II (b)(3)-P.L. 86-36 This article is UNCLASSIFIED except for the author's biography which is classified as marked. The bombing of the Philippines by the Japanese on 8 December 1941 came as a shock to the United States even though some Americans were braced for other attacks following the infamy of Pearl Harbor the previous day.
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