[IROC]

I had just walked into my junior-level mechanical engineering measurements class when the professor told us. 3 years later I was working on the Shuttle program (payloads).

I have been watching the Netflix documentary on this the last few days. Really good. I was at Marshall Space Flight Center starting in '89. I was down at an old warehouse on Redstone Arsenal that NASA used one time looking for stuff for my program and ran across the solid rocket motors that had been cut up and cross-sectioned to examine the o-rings. Very cool.