Spy Satellites

Image/radar intelligence

1959 - 1972
1960 - 1972
1961 - 1964
1964 - 1984
1971 - 1986
1976 - 2013
1988 - 2005

Signals intelligence

1962 - 1971
1962 - 1971
1968 - 1977
1970 - 1978
1971 - 2008
1976 - 2013
1978 - 1989
1985 - 1989

Other important events

10/04/1957
01/31/1958
05/1/1960
07/20/1969
1981