Alvarez, Harold D. Babcock, Leo Szilard, Hans Bethe, Felix Bloch, Aage N. Bohr, Niels Bohr, Gregory Breit, and Vannevar Bush. The scientists that worked on the atomic bomb were driven by the fear that Germany might develop the bomb before them. Officials in the United States did not feel like it was a good idea to let the axis powers learn of the work to develop the bomb, but they decided that some of the allied powers were not completely to trust “Roosevelt and Churchill agreed that... Stalin would be kept in the dark. Consequently, there was no public awareness or debate. Keeping 120,000 people quiet would be impossible; therefore only a small privileged cadre of inner scientists and officials knew about the atomic bomb's development”(Manhattan Project, 6). After the scientists finished their work it was left up to the