full exchange of technical information. Bush was strongly in favour of this proposal, and at their meeting on 8 July 1940, he offered advice on how it should be presented. It was endorsed at a Cabinet meeting on 11 July, and an official acceptance was conveyed to Lord Lothian, the British Ambassador to the United States, on 29 July. Among the wealth of information that the Tizard Mission, a scientific mission sent to the United States to promote the exchange of military science and technology, brought to America were details about the MAUD Committee's deliberations and activities. Some information from the MAUD Committee had already been conveyed to the United States by Ralph H. Fowler, the British scientific attaché to Canada. Cockcroft, a member of the Tizard Mission, brought more. Cockcroft and Fowler met with the Uranium Committee, but the information flow was largely one-way. Cockcroft reported that the American atomic bomb project lagged behind the British, and was not proceeding as fast. Work conducted in America included research by Szilard and Enrico Fermi at Columbia University into the possibility of a controlled nuclear chain reaction; preliminary investigations into isotope separation using centrifugation, gaseous diffusion and thermal diffusion processes; and efforts to produce plutonium in the cyclotron at the Radiation Laboratory at the University of California. Kenneth Bainbridge from Harvard University attended a MAUD Committee meeting on 9 April 1941, and was surprised to discover that the British were convinced that an atomic bomb was technically feasible. The Uranium Committee met at Harvard on 5 May, and Bainbridge presented his report. Bush engaged a group headed by Arthur Compton, a Nobel laureate in physics and chairman of the Department of Physics at the University of Chicago, to investigate further. Compton's report, issued on 17 May 1941, did not address the design or manufacture of a bomb in detail. Instead it endorsed a post-war project concentrating on atomic energy for power production. On 28 June 1941, Roosevelt created the Office of Scientific Research and Development (OSRD), with Bush as its director, personally responsible to the president. The new organisation subsumed the NDRC, now chaired by James B. Conant, the President of Harvard University. The Uranium Committee became the Uranium Section of the OSRD, but was soon renamed the S-1 Section for security reasons. Britain was at war, but the US was not. Oliphant flew to the United States in late August