There was a video he did for military medical in-processing
Brilliant
He went down in south Viet Nam burned terribly
Much time and effort recovering
Medically retired as major I imagine.
According to Wiki, he retired at 20 years, not likely a medical. He retired in 1990, a year after the Blackbird was retired.
Not sure why he didn’t make Colonel ... Seems like he’d have been a prime candidate for that.