April 11 in history, these intelligence were sent to the US president

情报历史上的4月11日，这些情报被递交给时任美国总统

Intelligence History on 1962 April 11
Intelligence History on 1963 April 11
Intelligence History on 1964 April 11
Intelligence History on 1966 April 11
Intelligence History on 1967 April 11
Intelligence History on 1968 April 11
Intelligence History on 1969 April 11
Intelligence History on 1970 April 11
Intelligence History on 1972 April 11
Intelligence History on 1973 April 11
Intelligence History on 1974 April 11
Intelligence History on 1975 April 11