The inability to accurately cite any story about this, and the "friend of a friend" structure is what implies it's garbage.
Not to mention it itself requires a conspiracy theory: "no one would do this work voluntarily" (or "all the smart people have to be tricked because they're so smart they obviously agree with me").
As though people don't just go and work at Boeing or Lockheed Martin.
> "no one would do this work voluntarily"
The much more common reason is compartmentalisation. Employees are told as much as they need to know, no more.
If someone can design a glide bomb without knowing that it has an explosive payload, then they're not told.
The fear is not so much the employees themselves (they might be quite patriotic!) but that the information will leak out to the enemy, giving them a chance to counter the weapon or copy it.
It was posted on HN by the husband of the person involved. Find it yourself.