The Douglas GAM-87 Skybolt (AGM-48 under the 1962 Tri-service system) was an air-launched ballistic missile (ALBM), equipped with a nuclear warhead, developed by the United States during the late 1950s. The UK joined the program in 1960, intending to use it on their V bomber force. A series of test failures and the development of submarine launched ballistic missiles (SLBMs) eventually led to its cancellation in December 1962. The UK had decided to base its entire 1960s deterrent force on Skybolt, and its cancellation led to a major confrontation between the UK and US, known today as the "Skybolt Crisis". This was solved during a series of meetings that led to the Royal Navy gaining the UGM-27 Polaris missile and construction of the Resolution class submarines to launch them.
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