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

情报历史上的1月31日，这些情报被递交给时任美国总统

Intelligence History on 1962 January 31
Intelligence History on 1963 January 31
Intelligence History on 1964 January 31
Intelligence History on 1966 January 31
Intelligence History on 1967 January 31
Intelligence History on 1968 January 31
Intelligence History on 1969 January 31
Intelligence History on 1970 January 31
Intelligence History on 1971 January 31
Intelligence History on 1972 January 31
Intelligence History on 1973 January 31
Intelligence History on 1974 January 31
Intelligence History on 1975 January 31
Intelligence History on 1976 January 31