Kept Top Secret for decades, a multi-volume history of signal interception masks the gaps of the 1960s and cuts off just before the domestic surveillance scandals broke wide open.
By Marcus Boone ·
Specific methods for protecting the government's most sensitive data remain hidden in a missing manual, though later breaches jeopardized national security for a generation.
By Vera Kessler ·
Foreign scientific personalities were tracked for their biographical data in an atomic race, while the secret state codified rigid rules for cover and NGO ties.
By Constance Bell ·