 In September 2011 Iranian president Mahmoud Ahmadinejad, who holds a PhD in Transportation Engineering and Planning, said that it would have been impossible for two jetliners to bring down the towers simply by hitting them and that some kind of planned explosion must have taken place.Al-Qaida sharply criticized Ahmadinejad in their English-language publication, "Inspire", calling his assertions "a ridiculous belief that stands in the face of all logic and evidence".Proponents of World Trade Center controlled demolition theories allege that 7 World Trade Center—a 47-story skyscraper that stood across Vesey Street north of the main part of the World Trade Center site—was intentionally destroyed with explosives.