Historical Overview of U.S. Signals Intelligence Agencies and Their Expansion
Summary
The passage outlines the evolution of U.S. cryptologic programs from the Black Chamber to the NSA, naming presidents (Hoover, FDR, Truman) and officials (Henry Stimson). While largely historical, it h President Hoover ordered the closure of the Black Chamber in 1929; FDR later reactivated it as the S The agency’s capabilities grew to include breaking Japanese 'Purple' cipher and German Enigma, lea
This document is from the House Oversight Committee Releases.
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