I saw this in a festival setting, with Spinney in the room. The Challenger part was a record scratch moment...the growing realization as he talks about getting a call from NASA, which mission he must mean...the whole room was in stunned silence.There are many emotionally harrowing moments in the film, more than I expected, and a lot more new information than I expected. But the lasting impression is just how sweet and down-to-earth Spinney and his wife seem. I couldn't shake the feeling that they might be friends of my parents or something. (They're not...it just felt that way, watching it).
More from him, including the Challenger story: http://www.reddit.com/r/IAmA/comments/356sal/hi_reddit_im_caroll_spinney_the_puppeteer_who_has/