Is the US involved in the 9/11 attacks?

In an artical from the Austin American Statesman, Rebublican Debra Medina confusingly voices her opinion on whether or not the American government had a hand in the attacks of 9/11. At the begining of the interview, she says that she thinks it is possible that we (America) could have something to do with this controversial debate over Americas innosence, or lack there of, of that horrible day. At some points, she tries to change her words around to make it seem as if she doesn't have an opinion on it either way until she jumps back to say that there are rumors that the US government is hiding away information that they don't want us to hear, and that there were some "very good arguments" that we were somehow involved with the deaths of the 3000 Americans that tragic day. Also throughout this artical, Demicrat, Farouk Shami makes off topic racist remarks about how white Americans refuse to work factory jobs and that without Hispanics, America would be "like a day without sunshine." Although this artical written confusingly, it is still good to read about other peoples ideas and views on certain events pertaining to the government. I personally disagree with everything that was mentioned in this artical, which is actually what drew me to read it. Artical: http://www.statesman.com/news/texas-politics/democrat-shami-also-raises-doubts-on-9-11-233460.html