thumb|right|W89 nuclear warhead thumb|W89 warhead (top) The W89 was an American thermonuclear warhead design intended for use on the AGM-131 SRAM II air to ground nuclear missile and the UUM-125 Sea Lance anti-submarine missile.
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- Reused plutonium pits
- Reliable Replacement Warhead link
- See also
- References
- External links
thumb|right|W89 nuclear warhead thumb|W89 warhead (top) The W89 was an American thermonuclear warhead design intended for use on the AGM-131 SRAM II air to ground nuclear missile and the UUM-125 Sea Lance anti-submarine missile.
What was to become the W89 design was awarded to the Lawrence Livermore National Laboratory in the mid-1980s. It entered Phase 2A technical definition and cost study in November 1986. It entered Phase 3 development engineering and was assigned the numerical designation W89 in January 1988.