On that fateful phone call NASA's Lawrence Mulloy reacted to the possible postponement this way: "My God, Thiokol. When do you want me to launch? Next April?" And that changed everything. Thiokol managers overruled their own engineers Bob Ebeling and Roger Boisjoly and Challengers fate was sealed. It’s heartbreaking to hear it in Ebelings own words. He had to live 30 years with that, before passing on March 2016.