At 8:30 of this video he brings it up during his talk at nasa and highlights the fact he can't talk about it for 25 years, he worked on aircraft for the army afterwards and then helped develop Javelin missile systems. He talks quite extensively about his history and so on here because (in his own words) he wanted to establish credibility with the nasa people who would otherwise not give a shit about what he has to say if he were just some youtube guy: https://youtu.be/OoJsPvmFixU?t=510

I think he presents himself in a very friendly way but is a loyal imperialist dog to his very core. A true believer.