Interesting note on WW2 expenditures, the B-29 Superfortress actually cost more than the Manhattan project. https://en.wikipedia.org/wiki/Boeing_B-29_Superfortr

Interesting note on WW2 expenditures, the B-29 Superfortress actually cost more than the Manhattan project. https://en.wikipedia.org/wiki/Boeing_B-29_Superfortress https://en.wikipedia.org/wiki/Boeing_B-29_Superfortress "Including design and production, at over $3 billion it was the single most expensive weapons project undertaken by the United States in World War II, exceeding the cost of the Manhattan Project by between $1 and 1.7 billion"