CarolC,

You can read the official explanation. It is the explanation that I believe, it is the explanation supported by science that is within my personal experience of construction, fire, explosion and impact (I work as a field-investigator in the marine insurance industry - everything from ships to port and terminal infrastrucutre, offshore and energy infrastructure.)

That you believe the official reports to be other than accurate, logical and factual then that is your prerogative, just don't expect anyone to take that leap of faith with you.

Take note: My respect for you and others is undiminished. I remain simply surprised at the conclusions you come to.