Back in 1962, NASA engineers fought over whether to trust nuclear or chemical...

https://mighty-wiki.win/index.php/Beyond_the_Hype:_How_to_Write_Skeptical_Science_Without_Being_a_Cynic

Back in 1962, NASA engineers fought over whether to trust nuclear or chemical engines for the Moon. The public saw a seamless mission, but these memos reveal a mess of bruised egos and real technical fear