> "Don't fly when it's really cold" wouldn't have been a particularly expensive mitigation, either The SRBs were not designed to work below 40F, so it would ha

> "Don't fly when it's really cold" wouldn't have been a particularly expensive mitigation, either The SRBs were not designed to work below 40F, so it would have been very reasonable to postpone launch (yet again). However, Reagan was going to give his State of the Union speech on that same evening, and putting a teacher in space was supposed to be a highlight of the speech...