March 31 in history, these intelligence were sent to the US president

情报历史上的3月31日，这些情报被递交给时任美国总统

Intelligence History on 1962 March 31
Intelligence History on 1964 March 31
Intelligence History on 1965 March 31
Intelligence History on 1966 March 31
Intelligence History on 1967 March 31
Intelligence History on 1970 March 31
Intelligence History on 1971 March 31
Intelligence History on 1972 March 31
Intelligence History on 1973 March 31
Intelligence History on 1975 March 31
Intelligence History on 1976 March 31