Jose wrote:

Paper burns at a lower temperature, probably too low to melt steel, so
I'm not convinced. Do you have a reference for paper as the cause of
the collapse?

Paper *ignites* at a relatively low temperature. Even that is higher than the
ignition point of jet fuel. Either will produce extremely high temperatures.

As for references. William Langewiesche, "American Ground: Unbuilding the World
Trade Center." Excerpts were published in the July and September 2002 issues of
the Atlantic Monthly.

George Patterson
Coffee is only a way of stealing time that should by rights belong to
your slightly older self.