The Bomb or the Laboratory

Vannevar Bush receives in early 1942 the conclusions of the MAUD Report, produced by British physicists: a uranium bomb is technically feasible, and Germany may already be working toward the same goal. The United States has just entered the war after Pearl Harbor, and every ton of steel, every engineer, every investment dollar is already claimed by the tanks, aircraft, and ships of the conventional mobilisation.

Bush grasps the scale of the gamble. Launching a full industrial programme means committing vast resources to the promise of a weapon that has never been built, whose physics remains partly theoretical, and which might never be ready in time to affect the conflict. Keeping the effort at laboratory scale would be more cautious: waiting for firmer proof of feasibility before squandering scarce means. But delaying further, or devoting all American industrial capacity to conventional armaments, risks allowing Germany to open an insurmountable lead.

Bush must decide: recommend to Roosevelt total industrial commitment, transforming the research into a colossal war project mobilising thousands of engineers and technicians; confine the effort to a laboratory programme until the scientific evidence is solid enough to justify the industrial leap; or give absolute priority to tanks, bombers, and ammunition, and set the bomb aside until conventional victory is secured.