[Non-Sequitur]

And the laws of large numbers argues against it. There have been tens of millions of aircraft flights, and this center tank thingy happens JUST ONCE???

An engine tore off the port mounting of a DC-10 only once (Flight 191 in Chicago, 1979). A cargo hatch blew out on a DC-10 once (Turkish Airlines, Flight 881, 1974). The thrust reverse system deployed in flight on a 767 once (Lauda Air, Flight 004, 1991). A lot of things happen once, mainly because corrective actions are taken.

[djf]

Good points, all. But I still think it does, as I said, argue against it.

[djf]

In fact I should amend my position a bit because supposedely there was a Singapore Airlines 737 that went down in 1990 due to a fuel tank explosion.