[newzjunkey]

Neither was a true accident.

They were catastrophes caused by engineering and managerial incompetence.

[He Rides A White Horse]

I hear you. As I noted, Challengers "O" rings failed. What was Columbia? Tile failure on a leading wing edge, burn through, and then an uncontrolled yaw?

I do get you point, however. I have heard it said that a tragedy is not one event, but a series of small mishaps at the wrong time combining to create a disaster. Something like that.