The Manhattan project did not cost anywhere near 3 trillion dollars, which would've been far, far larger than the entire world economy at the time, let alone the United States. The figure is closer to 2 billion with a B, or over 20 billion in today's dollars, which is actually backed up in the link.
ahp42 t1_j07zrl6 wrote
Reply to comment by jrkib8 in [OC] Cost of Carbon Zero - Historical Look At U.S. Funding of Fusion Energy by Metalytiq
The Manhattan project did not cost anywhere near 3 trillion dollars, which would've been far, far larger than the entire world economy at the time, let alone the United States. The figure is closer to 2 billion with a B, or over 20 billion in today's dollars, which is actually backed up in the link.