Look up a man named Larry Silverstein.

What many people don't realize is the WTC towers were in a terrible state. Silverstein, a Jew, purchased these buildings. A good deal of the interior of the buildings structure was coated in Asbestos. Each time a maintenance project had to be performed, they first had to pay special contractors to come remove the Asbestos from that region of the structure. Estimates on what it was going to cost to remove all asbestos from both buildings were beyond astronomical, well beyond the value of the buildings themselves.

Silverstein purchased terrorism insurance for both buildings just months in advance of the attacks, and would go on to sue after the disaster earning close to 5 billion dollars, if I remember correctly.

In addition, he would earn more due to the "demolition" of WTC Building #7, which he also owned. Several US intelligence agencies also had offices in Building 7.

In early 2001, Silverstein gave the go ahead for a renovation project on all of the building's elevator shafts, and if you realize how these buildings were built, this gave direct access to the core structures of the building. Many eyewitness accounts testify to the fact that they hired armed security to guard these shafts so there was zero access to any of the areas where work was being done. That security company which was contracted by Silverstein was a company owned by George Bush's cousin. I'm not kidding.

On the weekend just prior to 9/11, employees in the building stated there was massive work being done and the entire security system was shut down that weekend.