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
Operation Sandstone at Los Alamos on July 9 to make arrangements for the tests. They readily agreed that they would be scientific in nature, with Los Alamos supplying the technical direction and the armed forces providing supplies and logistical support. The cost of the tests, around $20 million, was divided between the Department of Defense and the Atomic Energy Commission. Lieutenant General John E. Hull was designated as test commander. Rear Admiral William S. Parsons and Major General William E. Kepner reprised their Operation Crossroads roles as deputy commanders. Joint Task Force 7 was formally activated on October 18, 1947. As its