W87 (nuclear weapon)/Definition

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A definition or brief description of W87 (nuclear weapon).

Intermediate yield thermonuclear weapon used to arm LGM-30 Minuteman III ICBMs after arms control treaties changed them from MIRV to single warhead; had been warhead for Peacekeeper single-warhead ICBM; safeguards include enhanced electrical isolation, LX-17 insensitive high explosive and a fire-resistant pit