Read Laurie Mylroie's stuff -- she has the goods. Check google.
I am very familiar with Laurie's work, but she is sometimes looked at as a conspiracy theorist and her facts are therefore discounted by those that choose not to do their research. If I remember correctly I believe the last response I got to that assertion was "Cheap Wal-Mart tin-foil material". However, documents are now beginning to surface that back up her theory and eventually, those naysayers will have to eat a healthy dose of crow, although I have found that some would not even believe it when I had other credible sources to back it up.