[centurion316]

If the war had been held up only a short time as it turned out

And who would have known this at the time? What if Germany had produced a nuke first? When you return from your trip to Neptune, let me know.

[muawiyah]

Joe Stalin knew. He was more worried about the Japanese program and actually had Sorge reveal the identity of a Japanese government spy in the Manhattan program to us (guy was English I believe).

The Japanese were almost as close to building nukes as we were and had construction underway on giant submarines that could carry planes close enough to the US to mount raids.

But that'd been on the West Coast ~ which was terribly underpopulated and undeveloped at the time ~ not a major threat to most Americans or their property.

Few extra billion bucks in the project, and we could have had those bombs earlier and been bombing Berlin in late 1944.