"In late 1965, the stage was being set for the final study of a new generation photographic satellite. It would be required to provide the resolution of earlier close-look satellites while simultaneously providing the broad area coverage capability of previous search/surveillance systems. On July 21, 1966 proposals for the Hexagon sensor were submitted to the government by both Itek and the Perkin-Elmer Corporation. At 1700 on October 10, Mr. Robert Sorensen, then Senior Vice President, Optical Group, received an important phone call from Mr. John J. Crowley, Director of Special Projects, CIA, -- Perkin-Elmer's proposal was accepted by the government. This is a story of the events that followed."-- from Introduction.