So glad you asked! A quintessentially American experiment, FDR mobilized vast public works projects one attempt to bootstrap the country out of depression. These teams built so much of 20th century America - but it's hidden by even bigger projects after WWII and tinged with a smear of socialism too, which of course is a dirty word.
https://en.wikipedia.org/wiki/Works_Progress_Administration?wprov=sfla1
Oh look, The WPA also built internment camps. History is complicated.