British hydrogen bomb programme Atomic Energy Act of 1946 (also known as the McMahon Act) ended technical cooperation. Fearing a resurgence of American isolationism, and the loss of Britain's great power status, the British government resumed its own development effort, which was codenamed "High Explosive Research". The successful nuclear test of a British atomic bomb in Operation Hurricane in October 1952 represented an extraordinary scientific and technological achievement. Britain became the world's third nuclear power, reaffirming the country's status as a great power, but hopes that the United States would be sufficiently impressed to restore the nuclear Special Relationship were soon dashed. In November
Redstone Test Stand in tests to study the effects of nuclear detonations in the upper atmosphere, Operation Hardtack I. After being static-fired at the Interim Stand in January 1958, two missiles were shipped to the Pacific Test Range. In July and August, the missiles became the first missiles ever to detonate atomic warheads. In 1958, Redstone development ended and Chrysler began mass production for deployment. Only a few of these missiles were tested at the Interim Test Stand because the propulsion system had become so reliable. As the space race continued, the civilian space agency, NASA started on October 1, 1958 but the