(NSI News Source Info) TORONTO, Canada - August 18, 2010: The United States has dismantled the last of 1,725 W62 nuclear warheads. Designed in the 1960s, the 115 kg/253 pound device had a yield of 170 kilotons. All were manufactured between 1970-76 and were used in Minuteman ICBMs.Over the last five years, the W62 warheads on 300 Minuteman III missiles were replaced with refurbished warheads of more recent design and manufacture. These were W87 warheads, that were originally built for the Peacekeeper missile, which carried ten W87s each. But the last Peacekeeper was retired last year, for cost and disarmament treaty reasons.
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