Declass 1 (1996) = Corona, Lanyard, &amp; Argon Missions - KH1 thru KH6: 1960 - 1972.
'On February 24, 1995, President Clinton signed an Executive Order, directing the declassification of intelligence imagery acquired by the first generation of United States photo-reconnaissance satellites, including the systems code-named CORONA, ARGON, and LANYARD. More than 860,000 images of Earth\'s surface, …