Here's one that did (a B-52) (link):
- 187 crashed 1/24/61 near Goldsboro, NC, fatigue failure of starboard wing after fuel leak at high altitude, wing failed when flaps selected during emergency approach to Seymour Johnson AFB, two nuclear weapons separated from the aircraft, one fell by parachute, and the other broke apart on impact
I'm still not jumping to any conclusions here, but it seems to me that it looked a lot like an accident yesterday morning and it looks a lot more intentional this afternoon.
I guess there's still a middle ground for some negligence in maintenance that led to this but I think the "burden of proof" just shifted in this case.