Anders Bjorkman is a structural engineer from France who became an early member of Richard Gage's AE911Truth. He had previously given speeches in his country to people whose children had seen footage of the Trade Towers’ destruction and were worried that buildings could collapse from the top down. He reassured these parents that this couldn’t happen and posted his presentation on his web site where it gradually developed.

Björkman became a formal critic of the “Progressive Collapse” or “Piledriver” theory promoted by Dr. Zdenek Bazant, a consultant for the National Institute of Science and Technology (NIST) in its work on 9-11. The Piledriver theory basically says that prolonged heating weakened the support columns of a single floor which caused the upper section to crush what was below it in a chain-reaction all the way to the bottom.

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