he made suggesting vaccines were poisonous and allegations of antisemitism. Advocacy Members of the organization argue that the buildings of the World Trade Center could not have collapsed only because of the impact of the planes, or as a result of the fires that had been caused by them. On the one hand Gage has said that avoiding speculation on the attacks on the Pentagon or on the involvement of the Bush administration is critical to the mission of the organization. But on the other hand, Gage has said that if the destruction of the World Trade Center was the result of a controlled demolition, this would mean that part of what happened on September 11, 2001, would have been planned by "some sort of an inside group". According to Gage, an elevator modernization program that had taken place before the attacks would have provided an opportunity to get access to the core areas of the WTC towers without creating suspicion. Investigations by the Federal Emergency Management Agency and the National Institute of Standards and Technology (NIST) have concluded that the buildings collapsed as a result of the impacts of the planes and of the fires that resulted from them. In 2005, a report from NIST concluded that the destruction of the World Trade Center towers was the result of progressive collapse initiated by the jet impacts and the resultant fires. A 2008 NIST report described a similar progressive collapse as the cause of the destruction of the third tallest building located at the World Trade Center site, the 7 World Trade Center. Many mainstream scientists choose not to debate proponents of 9/11 conspiracy theories, saying they do not want to lend them unwarranted credibility. The NIST explanations of the collapses are universally accepted by the structural-engineering and structural-mechanics research communities. World Trade Center towers Gage criticized NIST for not having investigated the complete sequence of the collapse of the World Trade Center towers, and claims that "the official explanation of the total destruction of the World Trade Center skyscrapers has explicitly failed to address the massive evidence for explosive demolition." In particular, Gage argues that the buildings of the World Trade Center could not have collapsed at the speed that has been observed without tearing apart several columns of their structures with the help of explosives. To support its position, Architects & Engineers for 9/11 Truth points to the