http://en.wikipedia.org/wiki/Ryszard_Kukliński
Ryszard Jerzy Kukliński (June 13, 1930 – February 11, 2004) was a Polish colonel and Cold War spy. Motivated by the desire to promote the Polish national interest, he passed top secret Warsaw Pact documents to the CIA between 1971 and 1981.
After the December 1970 massacre of Polish workers in Gdynia by communist forces, Kukliński contacted the CIA and offered his services as a spy. (According to another version, he was approached by the CIA in Vietnam as early as 1967.) Between 1971 and 1981 he passed 35,000 pages of mostly Soviet secret documents to the CIA. The documents described Moscow's strategic plans regarding the use of nuclear weapons, technical data about the T-72 tank and Strela-1 missiles, the distribution of Soviet anti-aircraft bases in Poland and East Germany, the methods used by the Soviets to avoid spy satellite detection of their military hardware, plans for the imposition of martial law in Poland, and many other matters.

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