115. Editorial Note
Allen Dulles’ briefing on “Significant Developments Affecting U.S. Security” to the National Security Council on April 4 at the 318th meeting was not declassified.
According to the memorandum of discussion at the April 11 319th NSC meeting, Allen Dulles reported “another nuclear test had occurred in the Soviet Union yesterday, making a total of three tests in the course of the last week. The detonation, said Mr. Dulles, was an extremely large one.” (Eisenhower Library, Whitman File, NSC Records) The Atomic Energy Commission later announced Soviet nuclear tests on April 3, 6, 10, 12, and 16, and indicated that the last one was one of the largest in its current series. (The New York Times, April 19, page 1)