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Strategic Defense Initiative

The Strategic Defense Initiative (SDI) was a plan created by U.S. President Ronald Reagan on March 23, 1983[1] to use ground and space-based systems to protect the United States from attack by nuclear ballistic missiles. The initiative focused on defense instead on the offensive mutual assured destruction (MAD).

  1. Federation of American Scientists. Missile Defense Milestones Archived 2008-12-22 at the Wayback Machine. Accessed March 10, 2006.



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Strategic Defense Initiative
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