The status of intelligence systems in the United States and Great Britain -- U.S.-U.K. relations, 1914-1935 : from cooperation to competition -- U.S.-U.K. relations, 1935-1939 : the beginnings of a strategic rapproachment -- Key U.S. policymakers and their attitudes toward cooperation -- ALUSNA London and the British NID, January 1939-March 1941 -- Courting the reluctant ally, June 1940-March 1941 -- The limits of exchange, March 1941-December 1941.