I'm a little underwhelmed by the witness list since three of the four have already spoken extensively on the matter. Don't get me wrong, they have a lot of interesting things to say, I'm just hoping they have something new to say. Or reveal their direct links to a legacy program.
For those already versed in the matter, it looks like Michael Gold might just be our star witness. Former NASA, and most interestingly, former Bigelow Areospace.
