Did chemical reactions cause Twin Towers collapse?

PARIS — A mix of sprinkling system water and melted aluminium from aircraft hulls likely triggered the explosions that felled New York's Twin Towers on September 11, 2001, a materials expert has told a technology conference.

"The aluminium industry had reported more than 250 aluminium-water explosions since 1980," he said.

In a controlled experiment carried out by Alcoa Aluminium, 20 kilos (44 pounds) of molten aluminium was allowed to react with 20 litres of water, along with a small quantity of rust.

"The explosion destroyed the entire laboratory and left a crater 30 metres (100 feet) in diameter," Simensen said.

http://www.rawstory.com/rs/2011/09/21/did-chemical-reactions-cause-twin-towers-collapse/