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The Secretary of State has expressed agreement with the anxieties and analyses presented in recent papers regarding the United States' Strategic Defense Initiative (SDI). It is noted that allowing the Americans to undermine the crucial deterrent argument while they pursue their SDI ambitions could create further difficulties. The message questions whether there is an obligation to show more loyalty to the American SDI dreams than they show to the reality of the UK's deterrent. The date of the message is October 20, 1986, and it is marked as "SECRET." Copies were sent to various officials and departments within the government.