The many conspiracy theories of 9/11

Ten years on, many sceptics still question whether al-Qaeda carried out the 9/11 attacks in New York. Some so-called ’conspiracy theorists’ believe the US government was responsible, while others say it was the work of Israeli agents. The most prominent conspiracy theories suggest that the collapse of the World Trade Center was the result of a controlled demolition. Al Jazeera’s Rob Reynolds reports from New York.