"The memo is one of more than 130 newly declassified CIA documents that detail the agency’s secret involvement in the printing of “Doctor Zhivago” — an audacious plan that helped deliver the book into the hands of Soviet citizens who later passed it friend to friend, allowing it to circulate in Moscow and other cities in the Eastern Bloc. The book’s publication and, later, the awarding of the Nobel Prize in Literature to Pasternak triggered one of the great cultural storms of the Cold War."