SPY Historian Vince Houghton sits down with engineer Phil Pressel to discuss his role in developing the KH-9 Hexagon spy satellite. The Hexagon, which was the last US spy satellite to use film, was declassified in 2011, allowing Pressel to write his book, Meeting the Challenge: The Hexagon KH-9 Reconnaissance Satellite. Houghton and Pressel discuss the formation of the project, the daunting technological hurdles, the impact of the satellite on US national security, and the top secret mission to recover film lost in the deepest waters of the Pacific Ocean.Video of interview available on the Spy Museum youtube page. https://www.youtube.com/watch?v=MmWlw8Ufo6Q This interview took place May 8th, 2014.