"The Northrop SM-62 Snark was a specialized intercontinental cruise missile with a nuclear warhead operated by the US Strategic Air Command from 1958 until 1961. It takes its name from Lewis Carroll's snark.
The Snark was developed to offer a nuclear deterrence to the Soviet Union at a time when ICBMs were still in development. It was the only intercontinental surface-to-surface cruise missile ever deployed by the United States Air Force. With the deployment of ICBMs, it was made obsolete and was taken out of service."