The W87 is a thermonuclear warhead developed by the United States for use on the LGM-30 Minuteman III intercontinental ballistic missile (ICBM). It was designed in the 1970s and entered service in 1986. The W87 has a yield of approximately 300 kilotons, making it one of the most powerful warheads in the U.S. nuclear arsenal. This warhead is notable for its advanced design, which includes features that enhance its reliability and safety. The W87 is part of the U.S. strategic deterrent force, aimed at preventing nuclear conflict through the threat of retaliation. It is maintained and modernized as part of the country's ongoing nuclear policy.