Officials said they did not know what caused the crash.

And officials said they had no idea as to what caused the crash.

It could be several months before they are ready to say what caused the crash.

Still, that alone should not have caused the crash, they said.

But they could not yet say if that caused the crash.

Air Force officials were not able to say this evening what had caused the crash.

"It could tell us a lot about what caused the crash."

Few of the families were interested in what had caused the crash.

Those who caused the crash thought they were playing it safe.

"There are at least three or four issues which combined" to cause the crash, he said.