It's definitely in rarefied territory, but that alone does not make it a significant historic first. The US Interstate Highway System cost $535 billion in 2020

It's definitely in rarefied territory, but that alone does not make it a significant historic first. The US Interstate Highway System cost $535 billion in 2020 dollars, according to https://en.wikipedia.org/wiki/Interstate_Highway_System https://en.wikipedia.org/wiki/Interstate_Highway_System . The Apollo project cost $165 billion in 2021 dollars, according to https://en.wikipedia.org/wiki/Apollo_program https://en.wikipedia.org/wiki/Apollo_program .