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

情报历史上的7月31日，这些情报被递交给时任美国总统

Intelligence History on 1961 July 31
Intelligence History on 1962 July 31
Intelligence History on 1963 July 31
Intelligence History on 1964 July 31
Intelligence History on 1965 July 31
Intelligence History on 1967 July 31
Intelligence History on 1968 July 31
Intelligence History on 1969 July 31
Intelligence History on 1970 July 31
Intelligence History on 1971 July 31
Intelligence History on 1972 July 31
Intelligence History on 1973 July 31
Intelligence History on 1974 July 31
Intelligence History on 1975 July 31
Intelligence History on 1976 July 31