Comment: Dust yes. And don't forget the 3 and 4 ton beams

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In reply to comment: Force on beams would be easy also. (see in situ)

Dust yes. And don't forget the 3 and 4 ton beams

shot out at 70mph that they found embedded in buildings across the street. You can see embedded beams at slide 405 here:
http://www.naderlibrary.com/911.blueprintfortruthae3.htm

In this video those long specks are not chairs, they are 2 and 4 ton pieces of beam, spinning from some explosive force even UPWARDS. Like "compressed air" does that, right!

http://www.youtube.com/watch?v=BnR4A4zb8B0&feature=related

Release the Sandy Hook video.