How and why were the towers destroyed?

The actual undoctored film shows that there were no planes involved in the twin tower destruction. Watch
There where also other buildings demolished on that day like the infamous building 7. The BBC reporter was talking live on TV,
saying that building 7 had collapsed when we could still see it standing behind her, in the background. Watch
The buildings where dustified by various means, no planes required. Watch
There is much evidence proving that these buildings where taken down by design. Watch
Clear "real time" evidence of the "dustification process" by "DEW technology". Watch
So who did "9-11"? Watch