The Pentagon's Brain: An Uncensored History of DARPA, America's Top-Secret Military Research Agency

by Annie Jacobsen

By the time of the Cuban Missile Crisis, Eisenhower’s test ban had failed, and the United States and the Soviet Union had both returned to nuclear weapons testing. Twice during the height of the Cuban Missile Crisis, on October 20 and October 26, 1962, the United States detonated two nuclear weapons—code-named Checkmate and Bluegill Triple Prime—in space. These tests, which sought to advance knowledge in ARPA’s pursuit of the Christofilos effect, are on the record and are known. What is not known outside Defense Department circles is that in response, on October 22 and October 28, 1962, the Soviets also detonated two nuclear weapons in space, also in pursuit of the Christofilos effect. In recently declassified film footage of an emergency meeting at the White House, Secretary of Defense McNamara can be heard discussing one of these two Soviet nuclear bomb tests with the president and his closest advisors. “The Soviets fired three eleven-hundred-mile missiles yesterday at Kapustin Yar,”