How did the United States implement the SDI plan?

1983 18 In April, Reagan signed the National Security Directive No.6, requiring the Ministry of National Defense to complete the efficacy evaluation of SDI before the end of June of that year 10, and determine the long-term research and development plan to finally eliminate the nuclear threat. With the national security directive No.6 as the symbol, SDI plan was formally implemented.

1984 65438+1On October 6th, Reagan signed the secret orderNo. 1 16, demanding that the Ministry of National Defense immediately start the research on the laser and particle beam anti-missile plan and immediately set up the Strategic Defense Agency (SDIO). From 65438 to 0987, the United States Strategic Defense Initiative Agency made appropriate adjustments to the SDI development plan. After the disintegration of the former Soviet Union, the United States relaxed the implementation of the SDI plan for domestic political, diplomatic and financial reasons.