September 20 in history, these intelligence were sent to the US president

情报历史上的9月20日，这些情报被递交给时任美国总统

Intelligence History on 1961 September 20
Intelligence History on 1962 September 20
Intelligence History on 1963 September 20
Intelligence History on 1965 September 20
Intelligence History on 1966 September 20
Intelligence History on 1967 September 20
Intelligence History on 1968 September 20
Intelligence History on 1969 September 20
Intelligence History on 1971 September 20
Intelligence History on 1972 September 20
Intelligence History on 1973 September 20
Intelligence History on 1974 September 20
Intelligence History on 1975 September 20
Intelligence History on 1976 September 20