The first atomic bomb test by the Soviet Union in August 1949 came earlier than expected by Americans, and over the next several months there was an intense debate within the U.S. government, military, and scientific communities regarding whether to proceed with development of the far more powerful hydrogen bomb, then known as "the Super". Strauss urged for the United States to move immediately to develop it, writing to his fellow commissioners on October 5 that "the time has come for a quantum jump in our planning ... we should make an intensive effort to get ahead with the super." In particular Strauss was unswayed by moral arguments against going forward, seeing no real difference between using it and the atomic bomb or the boosted fission weapon that some opponents of the Super were advocating as an alternative. When Strauss was rebuffed by the other commissioners, he went to National Security Council executive secretary Sidney Souers in order to bring the matter to President Truman directly. It was as a consequence of this meeting that Truman first learned (when Souers informed him) that such a thing as a hydrogen bomb could exist. In a memorandum urging development of the Super he sent to President Truman on November 25, 1949, the pious Strauss expressed no doubt about what the Soviets would do, writing that "a government of atheists is not likely to be dissuaded from producing the weapon on 'moral' grounds."