Trying to figure out if any one person, or small group of individuals was directly responsible is going to be next to impossible. Exactly like the JFK assassination, we know something other than the "official" story actually happened but we still can't prove it 50+ years later. It's too bad America was so willing to believe, despite all the engineers, architects, pilots, police and fire first responders, survivors, and victims telling us "That's Not What Happened". Follow the money tends to be a pretty good method of sorting through all the BS and lies -maybe one day we will know but i'm not holding my breath...

When do we know if the government is lying to us - just wait for them to speak...