Peter R. wrote:
"Everett M. Greene" wrote:

It now has been "declassified" and the Discovery Channel
had a program about the very subject.

What is the name of this program?

I didn't even know DoT has a security system that includes
classification of documents. If it were a DoD program, I would ask the
"classifying authority" is and have a chat with him/her. It could be
classified by a document (policy) and you can get a copy of that.