30 Years After Explosion, Challenger Engineer Still Blames Himself : The Two-Way : NPR

Bob Ebeling, an anonymous source for NPR’s 1986 report on the disaster, tells NPR that despite warning NASA of troubles before the launch, he believes God "shouldn’t have picked me for that job."

http://www.npr.org/sections/thetwo-way/2016/01/28/464744781/30-years-after-disaster-challenger-engineer-still-blames-himself