Strategic Defense Initiative - Simple English Wikipedia, the free encyclopedia
![](http://upload.wikimedia.org/wikipedia/commons/thumb/e/ee/Sdilogo.png/200px-Sdilogo.png)
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).
Notes
[change | change source]- ↑ Federation of American Scientists. Missile Defense Milestones Archived 2008-12-22 at the Wayback Machine. Accessed March 10, 2006.