[relbeek2]

Just a slight correction, the o-ring not being tested in freezing conditions wasn't an oversight that destroyed the challenger; the engineers knew that the o-ring hadn't been tested at that unusually low temperature and even suspected it could fail at those temperatures.

Management at Morton Thiokol and NASA disregarded those concerns because they had already scrubbed the launch several times.

Bureaucracy is forged from the furnace of past adversities.