Photos: Surplus missile motor from 1960s launches classified NRO satellites
A Cold War-era missile motor cast with solid propellant in 1966 fired up for the first time Wednesday to catapult a Northrop Grumman Minotaur 1 rocket off a launch pad in Virginia with three small spacecraft for the U.S. government’s spy satellite agency.
https://spaceflightnow.com/2021/06/20/photos-surplus-missile-motor-from-1960s-launches-classified-nro-satellites/