whether by incompetence or design, US government is involved
Even if the government is not directly involved
The terrorists had valid visa to train to fly planes in Florida
Cia funded Bin Ladin
http://www.nbcnews.com/id/3340101/t/bin-laden-comes-home-roost/
World Trade Center is a government owned building whose design was approved by the Port Authority
https://en.wikipedia.org/wiki/World_Trade_Center_%281973%E2%80%932001%29#Design