[fidelis]

Back to the drawing board.

I worked for a major rocket manufacturer in the 1980's and early 90's and every launch is a nail-biter. So many little things can go wrong, but one little thing is all it takes to blow the whole thing to hell.

[one guy in new jersey]

A commenter suggests that, based on the circumstances and timing of the mission failure, the cause was likely a bus failure.

[MHGinTN]

Sounds like an explosive retention bolt failure.