You mean like this operation? Fact is, with enough controls in place, it has been done and likely continues to be done based on the previous success.

Going to the moon is not the same as hiding the end product of industrial work. Also... We know about the Manhattan project...

Lol. This phrase is how one exposes oneself as a fed, regardless of the matter you are talking about.

They're not identical, but the concept of keep something secret from hundreds of thousands of people who are contributing to said project IS possible. So the idea that too many people would be involved doesn't add up, especially with all the other evidence, like: Deathbed confessions "Losing" arguably the most important footage and telemetry data in history Unenclosed container next to a vacuum. It's a lot like showing an experiment that demonstrates a lack of curvature across a large distance, and then asking me to explain flights from Sydney to Chile.

Secrets are easy to keep of you don't know them.