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

情报历史上的10月31日，这些情报被递交给时任美国总统

Intelligence History on 1961 October 31
Intelligence History on 1962 October 31
Intelligence History on 1963 October 31
Intelligence History on 1964 October 31
Intelligence History on 1966 October 31
Intelligence History on 1967 October 31
Intelligence History on 1968 October 31
Intelligence History on 1969 October 31
Intelligence History on 1970 October 31
Intelligence History on 1972 October 31
Intelligence History on 1973 October 31
Intelligence History on 1974 October 31
Intelligence History on 1975 October 31