Many thanks Len.
Engineers from MT stated their advice before the flight on the basis of the O rings not having been specc`d to operate at the low temperatures existing on the morning of the flight.
Richard conducted tests after the disaster which determined the actual cause and which confirmed that the actual advice provided to NASA should not have been dismissed.
As I stated previously, it was an outrageous management decision to proceed with the flight.
Incidentally, most people remember that Christa McAuliffe (School Teacher) was on the flight, but hardly anyone remembers that Judi Resnik( second American female to fly in space) was on board too.