The race continued into the 1970’s with the significant development of MIRV (multiple independently-targeted reentry vehicle). One missile could now carry many warheads, each of which could be directed to a separate target. For example, the modern American MX, or Peacekeeper, missile carries ten such warheads; so does the Soviet SS-18. Each missile, therefore, can destroy ten cities.

[Diagram on page 5]

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One MX missile has the power of 300 Hiroshima bombs, enough to destroy an area of 240 square miles

MANHATTAN

Hiroshima blast

MX missile blast