I can't imaging trying to hide a Manhattan project today. They hid an entire city containing tens of thousands of people and consuming a serious whole segments

I can't imaging trying to hide a Manhattan project today. They hid an entire city containing tens of thousands of people and consuming a serious whole segments of the total US electrical grid and federal budget. Modern civilian OSINT would have been adequate to deduce fission work was being performed, assuming no one posted centrifuge schematics on their gaming Discord. And it still didn't succeed, the first world leader to learn that fission weapons work was Stalin.