"The twin towers were brought down by a controlled ground explosion, not the planes," said Hart, adding that this view was based on his close friendship with consultants who work with the world's leading civil engineering and construction firm.
Hart asked the company to study the collapse of the twin towers, after which they told him directly, "There's absolutely no doubt whatsoever that the towers were brought down by a controlled ground explosion"..read more
Listen to the full interview with Alan Hart below. The 9/11 discussion begins at around the 35 minute mark..scroll down and click on the radio link (high quality).