These are five U.S. submarine-launched ballistic missile models of unknown scale. On the far left is the Polaris A-1, which carried one nuclear warhead, had a range of 1,400 miles, and was deployed during the 1960s. Next is the Polaris A-2, which carried one nuclear warhead, had a range of 1,700 miles, and was deployed during the 1960s and 1970s. The middle missile is the Polaris A-3, which carried up to six nuclear warheads, had a range of nearly 2,900 miles, and was deployed from the late 1960s into the early 1980s. The fourth missile is the Poseidon, which carried up to fourteen nuclear warheads, had a range of over 3,000 miles, and was deployed from the 1970s until the early 1990s. The last missile is the Trident, which carries up to eight nuclear warheads, has a range of over 4,500 miles, and was first deployed in late 1980s. John and Cynthia Heyde donated these models to NASM on an unknown date.