The man who fought for Lunar Orbit Rendezvous (LOR) and played a critical role in the Apollo missions
Sources:
https://wehackthemoon.com/bios/john-c-houbolt
https://www.nasa.gov/langley/hall-of-honor/john-c-houbolt
https://www.nasa.gov/centers/marshall/history/vonbraun/bio.html
https://history.nasa.gov/SP-4308/ch8.htm
https://en.wikipedia.org/wiki/Lunar_orbit_rendezvous
https://www.space.com/25570-nasa-moon-pioneer-john-houbolt-obituary.html
https://www.nasa.gov/content/john-c-houbolt-unsung-hero-of-the-apollo-program-dies-at-age-95
https://www.youtube.com/watch?v=atM5lmX5tPk
https://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19880069339.pdf
