Trident (UK nuclear programme) Agreement merged with the American Manhattan Project to create a combined American, British, and Canadian project. The British government expected that the United States would continue to share nuclear technology, which it regarded as a joint discovery, but the United States Atomic Energy Act of 1946 (McMahon Act) ended technical co-operation. Fearing a resurgence of United States isolationism, and Britain losing its great power status, the British government resumed its own development effort. The first British atomic bomb was tested in Operation Hurricane on 3 October 1952. The subsequent British development of the hydrogen bomb, and a fortuitous international relations
Atomic Heritage Foundation local communities, and other organizations to urge Congress to establish a Manhattan Project National Historical Park. In March 2013, Senators Maria Cantwell and Lamar Alexander introduced S. 507 to create a park, and Representatives Doc Hastings, Ben Ray Lujan, and Chuck Fleischmann introduced a companion bill in the House, H.R. 1208. The Los Alamos, V-Site was the site of assembly for the Trinity device, the first atomic weapon ever detonated. In October 2006, the AHF co-hosted several days of events to commemorate the successful restoration of the High Bay building. The Atomic Heritage Foundation has created several museum exhibits. They