Most Americans believe that only 2 towers fell on 9/11. However, there was a third tower that collapsed later that day, Building 7. The circumstances surrounding its fall lead to some very unsettling questions. Over 3,000 licensed architects and engineers from around the world have signed a petition requesting the US Government to reinvestigate this case. Richard Gage is one of them. He and Lionel discuss the suspicious collapse of Building 7 and towers 1 and 2. Video by Lionel Media.