the other man there, Michael Hess. Michael Hess was Mayor Rudolf Giuliani's chief lawyer, in charge of 800 New York City lawyers. In his first interview since 9/11 he confirms our timeline. Hess says all the lights went out and he felt the building shake like an earthquake and he adds that he did not hear explosions. In his mind he thought there might have been an explosion. In the only interview he did on 9/11 he told a reporter he had "walked down to the eighth floor where there was an explosion." But as our interview with him shows, he is now certain that he did not hear an explosion. He just assumed on the day it could have been an explosion because he had witnessed the lights going out, the staircase filling with smoke and the building shaking vigorously. In order to see this content you need to have both Javascript enabled and Flash installed. Visit BBC Webwise for full instructions. If you're reading via RSS, you'll need to visit the blog to access this content. We now know, courtesy of the final official report on 9/11 [pdf link] by the National Institute of Standards and Technology, that the official investigators think that two areas of Tower 7 were badly hit when the 1,350 foot Tower 1 collapsed. Seven columns were severed on the southwest corner and they suggest debris also hit the top centre face of Tower 7. The lead investigator of NIST told me that "it's