Trident I C-4 missile and the Poseidon C-3 missile - Sunnyvale, California 1981
A view of a mock-up of a Trident I C-4 missile, right, and its predecessor, the Poseidon C-3 missile. The Trident is used on the nuclear-powered fleet ballistic missile submarine. In the foreground is a model of the nuclear-powered fleet ballistic missile submarine USS ULYSSES S. GRANT (SSBN-631) showing a simulated launching of a Poseidon missile. This photo was taken in Sunnyvale, California in 1981.