A member of the Communist Party spent years insulating a nuclear spy from the state; the Security Service kept the details of his 'legal help' in a personal file for decades.
By Constance Bell ·
For decades, the U.S. government held a mirror to its own infiltration, keeping the decryption of Soviet telegrams secret while agents stole the atomic bomb.
By Vera Kessler ·
He spent years passing damaging nuclear secrets to the KGB and GRU, a betrayal tracked in Security Service files that only came to light through a sensitive American source.
By Harlan Pryce ·