11.   The documents were tucked away in Soviet archives shortly after the war.

12.   The documents were tucked away in Soviet archives shortly after the war, Russian officials said.

13.   The documents were hidden away in Soviet archives shortly after the war, Interfax said.

14.   The documents had been tucked away in Soviet archives since shortly after the war.

15.   The Soviet Union funded the American Communist Party and used it to steal nuclear secrets, according to a book based on newly released documents from the Soviet archives.

16.   Three years ago, American producer Tristan Del signed a controversial contract with Russian authorities to bring recordings from Soviet archives to the West.

17.   Volkogonov is known for his biographies on Stalin and his predecessor, Vladimir Lenin, based on previously secret Soviet archives.

18.   Volkogonov is known for his biographies on Stalin and his predecessor, Vladimir Lenin, based on Soviet archives.