In 1962, NASA engineers spent more time debating propulsion methods than...

https://oscar-wiki.win/index.php/The_Lunar_Orbit_Rendezvous:_Why_the_%22Crazy%22_Plan_Was_Actually_the_Only_Way_to_the_Moon

In 1962, NASA engineers spent more time debating propulsion methods than actually building rockets. You’d think the choice between nuclear thermal and chemical fuel would be a simple math problem, but it turned into a career-defining grudge match