Reports of vans packed with explosives were confirmed at the World Trade Center on September 11th, 2001 as well as sub level explosions, among many other explosions. Vans were also discovered around the area, one had been exploded, one had been stopped for having a picture on the side of it with a plane flying into the World Trade Center, one had been stopped and found with explosives in it, and many others. The FBI actually had confirmed that a device was found in the complex and the building had begun to evacuate. It was this evidence that made the Federal Agency to speculate that a van packed with explosives was parked in the garage which was detonated to help weaken the structure.
The New York City Authorities released the recordings of the radios from that day where one officer reports a van actually exploding and him needing assistance ASAP. Another series of radio communication confirms that a van was pulled over for having a mural on the side of it depicting a plane flying into the World Trade Center. Reference to the mural van was also made in the February 2006 Norman Y. Mineta International Institute for Surface Transportation Policy Studies (MTI) report entitled: “Saving City Lifelines: Lessons Learned in the 9-11 Terrorist Attacks”.