Operation Totem Cockcroft, the director of the Atomic Weapons Research Establishment at Harwell personally lodged a formal request for a feasibility study with the Prime Minister of Australia, Robert Menzies, at a meeting on 4 September 1952. Other matters discussed included the attendance of Butement and Leslie Martin, the Australian Defence Scientific Adviser, as Australian observers at the Hurricane test, the creation of the Australian Atomic Energy Commission, and the supply of Australian uranium to the UK. Cockcroft reported to Sir Roger Makins at the Foreign Office that Menzies had agreed in principle to Penney's reconnaissance of the Emu Field site. Penney
Test No. 6 so great that the Soviet Union ceased all assistance to China. Thus, the Number 6 test was indeed an independent endeavor, after the induced military and economic sanctions enacted by the superpowers at the time, the United States and the Soviet Union. Nevertheless, a comparison of other fission-to-fusion timespans may be instructive. The time between the U.S.'s first atomic test and its first hydrogen bomb test was 86 months, for the USSR it was 75 months, for the UK 66 months and later for France, 105 months. The goal of China was to produce a thermonuclear device of at least