Recently, France and Britain concluded a defense agreement which, among other things, provides for increased joint nuclear research between the two. In the spirit of that nuclear cooperation – and also in the spirit of getting things done while Congress has their heads up their asses – I have decided to reprint my essay “Underground Testing: Anglo-American Nuclear Cooperation, 1946-58.”
In 1946, atomic collaboration between Great Britain and the United States screeched to a halt. The fruitful partnership between the ‘Tube Alloys’ team in the United Kingdom and the scientists of the Manhattan Project had grown increasingly one-sided, with the United States’ research contributions far outstripping those of the British by the end of World War II. Two atomic bombs were dropped on the Japanese cities of Hiroshima and Nagasaki in August of 1945, demonstrating the arrival of nuclear hegemony. The British were merely informed of the decision, to which they acquiesced with “little or no debate.” As the technology gap across the Atlantic Ocean continued to widen in the immediate postwar period, Britain was increasingly thrust into a lesser, subordinate role.
With the passage of Senator Brien McMahon’s Atomic Energy Act in 1946, Anglo-American collaboration in the field of nuclear power and weaponry appeared to be at a congressionally-mandated end. Much of Thatcher-era historiography views that collaboration as entirely dormant until the McMahon Act’s repeal in 1958, and that in the meantime Britain forged on as the jilted partner in the ‘special relationship’. While true on an official level, this ignores the underlying reality of close continuing cooperation on atomic weaponry between 1946 and 1958. Nuclear cooperation did not hit a wall in 1946; it merely endured ‘underground’ for twelve years.