Internationalism No. 85, March 2026 Page 15 From the series Atom and industrialisation of science It was only after Hiroshima and Nagasaki, in August 1945, that the Soviet Union became fully committed to the project of acquiring the atomic bomb. The alliance of the US, the UK, and the USSR Producing U-235 accounted for 64% of the total cost of the Manhattan Project, while plutonium production made up another 20%; in total, 84% of the expense went toward producing material for the atomic bombs, as against only 4% spent on research and development [ Lotta Comunista , July-August 2018]. In 1945, the most urgent problems to be resolved for Russian imperialism were not tied to the scientific knowledge required for the atomic bomb, but to uranium and its processing. During the Second World War, under the Lend-Lease Act passed on March 11th, 1941, the United States gave its allies food, oil, and supplies worth $46 billion ...