The Strategic Defense Initiative (SDI) was a plan created by U.S. President Ronald Reagan on March 23, 1983 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).= = = Circa = = =
ð ə WORD_BOUNDARY s t ɹ ə t iː d̠ʒ ɪ k WORD_BOUNDARY d ɪ f ɛ n s WORD_BOUNDARY ɪ n ɪ ʃ iə t ɪ v WORD_BOUNDARY ɛ s d iː aɪ WORD_BOUNDARY w ʌ z ʌ WORD_BOUNDARY p l æ n WORD_BOUNDARY k ɹ iː eɪ t ɪ d WORD_BOUNDARY b aɪ WORD_BOUNDARY j uː WORD_BOUNDARY ɛ s WORD_BOUNDARY p ɹ ɛ z ɪ d ə n t WORD_BOUNDARY ɹ ɑ n ə l d WORD_BOUNDARY ɹ eɪ ɡ ə n WORD_BOUNDARY ɔ n WORD_BOUNDARY m ɑ ɹ t̠ʃ WORD_BOUNDARY t w ɛ n t i WORD_BOUNDARY θ ɹ iː WORD_BOUNDARY n aɪ n t iː n h ʌ n d ɹ ɪ d WORD_BOUNDARY eɪ t i WORD_BOUNDARY θ ɹ iː WORD_BOUNDARY t ə WORD_BOUNDARY j uː z WORD_BOUNDARY ɡ ɹ aʊ n d WORD_BOUNDARY æ n d WORD_BOUNDARY s p eɪ s b eɪ s t WORD_BOUNDARY s ɪ s t ə m z WORD_BOUNDARY t ə WORD_BOUNDARY p ɹ ə t ɛ k t WORD_BOUNDARY ð ə WORD_BOUNDARY j uː n aɪ t ɪ d WORD_BOUNDARY s t eɪ t s WORD_BOUNDARY f ɹ ʌ m WORD_BOUNDARY ʌ t æ k WORD_BOUNDARY b aɪ WORD_BOUNDARY n uː k l ɪ ɹ WORD_BOUNDARY b ʌ l ɪ s t ɪ k WORD_BOUNDARY m ɪ s ə l z WORD_BOUNDARY ð ɪ WORD_BOUNDARY ɪ n ɪ ʃ iə t ɪ v WORD_BOUNDARY f oʊ k ə s t WORD_BOUNDARY ɔ n WORD_BOUNDARY d ɪ f ɛ n s WORD_BOUNDARY ɪ n s t ɛ d WORD_BOUNDARY ɔ n ð ɪ WORD_BOUNDARY ə f ɛ n s ɪ v WORD_BOUNDARY m j uː t̠ʃ uː ə l WORD_BOUNDARY ə ʃ ʊ ɹ d WORD_BOUNDARY d ɪ s t ɹ ʌ k ʃ ə n WORD_BOUNDARY ɛ m eɪ d iː WORD_BOUNDARY iː k w ə l z WORD_BOUNDARY iː k w ə l z WORD_BOUNDARY iː k w ə l z WORD_BOUNDARY s ɜː k ə WORD_BOUNDARY iː k w ə l z WORD_BOUNDARY iː k w ə l z WORD_BOUNDARY iː k w ə l z WORD_BOUNDARY