In 1957, which US President announced a two-year suspension of nuclear testing?
Nuclear weapons and the United Kingdom were doing. On 22 August 1958, US President Dwight D. Eisenhower announced a moratorium on nuclear testing. This did not mean an immediate end to testing; on the contrary, the United States, the Soviet Union and the United Kingdom all rushed to perform as much testing as possible before the deadline. A new British test series, known as Grapple Z, commenced on 22 August. It explored new technologies such as the use of external neutron initiators, which had first been tried out with Orange Herald. Core boosting using tritium and external boosting with layers of lithium deuteride were successfully tested,
British nuclear testing in the United States British nuclear tests were conducted at the NTS. Preparations were under way for another test in 1992 when President George H. W. Bush announced a moratorium on testing, much to the surprise of both American and British personnel at the NTS. This moratorium was extended by his successor, President Bill Clinton. In 1996, the United States signed the Comprehensive Nuclear Test Ban Treaty (CTBT), but the US Senate failed to ratify it in 1999. The United Kingdom signed the CTBT in 1996, and ratified it in 1998 becoming, with France, the first two of the five declared nuclear-weapon states to