[calcowgirl]

The B-2 bombers were so expensive that only 21 were built.

Correction:

The B-2 bombers were so expensive that because only 21 were built.

[irishtenor]

Thank you, I was going to say that. As the person who machined all of the major parts to this airplane, I saw how much was spent on tooling. Many more COULD have been made at a much smaller cost, but it was not to be.