[null and void]

As I recall, two Morton Thiokol engineers were arguing against a launch as it was too cold outside.

You don't quite recall correctly.

Not one single Morton Thiokol engineer would approve the launch.

Read that line again.

The company could not find an engineer, any engineer, to approve the launch.

A non-technical manager signed off on it.

[SaveFerris]

I only heard of the two but I’m sure that’s probably correct.

[ A non-technical manager signed off on it. ]

That part I did know.