This groundbreaking historical study reveals the shocking infiltration of Soviet spies in America-and the top-secret cryptography program that caught them. Only in 1995 did the United States government officially reveal the existence of the super-secret Venona Project. For nearly fifty years American intelligence agents had been decoding thousands of Soviet messages, uncovering an enormous range of espionage activities carried out against the United...

In the spring of 1940, the Soviet Union carried out the mass executions of 14,500 Polish prisoners of war - army officers, police, gendarmes, and civilians - taken by the Red Army when it invaded eastern Poland in September 1939. This work details the Soviet killings, the elaborate cover-up of the crime, and the subsequent revelations.