Literally dozens of people - including journalists, police officers, WTC employees, emergency medical workers, and firefighters - reported hearing explosions in the Twin Towers, with some of them explicitly saying that the collapses appeared to be instances of controlled demolition. One fire captain said: "I hear an explosion and I look up. It is as if the building is being imploded, from the top floor down, one after another, boom, boom, boom." [A] paramedic said: "It was [like a] professional demolition where they set the charges on certain floors." One firefighter said: "It seemed like on television [when] they blow up these buildings." Given all the features that indicate controlled demolition, it is not surprising that when a controlled demolition expert in Holland was shown videos of the collapse of WTC 7, without being told what the building was ... he said: "They have simply blown away columns. A team of experts did this. This is controlled demolition." Two emeritus professors of structural analysis and construction at Zurich's prestigious ETH Institute of Technology say that WTC 7 was "with the highest probability brought down by explosives." FEMA, the first agency given the task of explaining the collapse of the WTC, said that its best explanation for the collapse of WTC 7 had "only a low probability of occurrence." The 9/11 Commission avoided the problem by simply not finding room to mention this collapse in its 571-page report. This behavior is no surprise given the fact that the Commission was run by its executive director, Philip Zelikow, who was virtually a member of the Bush-Cheney administration.