This film shows a panel discussion from the groundbreaking 1995 conference, "Piercing the Curtain: Corona and the Revolution in Intelligence," about the US's first photo-reconnaissance (spy) satellite program.
This panel is comprised of people who worked on Corona, including a former director of the National Reconnaissance Office, a former director of the National Security Agency, and a former Secretary of the Air Force.
The film was recently released due to a Mandatory Declassification Review request, and was digitized and posted by The Memory Hole. For more info and films from the conference, see http://www.thememoryhole.org/nro/corona_films.htm
The streaming version has been posted as one file, but the three non-streaming versions (at various resolutions) have been broken into two parts each.