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From Wikipedia, "The Manhattan Project began modestly in 1939, but grew to employ more than 130,000 people and cost nearly US$2 billion (equivalent to about $23
by GartzenDeHaes 4y ago
From Wikipedia, "The Manhattan Project began modestly in 1939, but grew to employ more than 130,000 people and cost nearly US$2 billion (equivalent to about $23 billion in 2020)". And that did not include any missiles.
I don't think anyone is making that kind of money on upwork.