Everyone remembers what they were doing 16 years ago today.
I'd just got back to the office from lunch, and saw on Yahoo news that a plane had hit one of the WTC towers. Then another article appeared, saying that a second plane had hit the other tower. "Hoax", I thought, and got on with my work. Then the phone calls started. Not much work got done that afternoon.
The conspiracy theories live on, some of them quite bizarre, for example suggesting that the planes were actually holograms. Conspiracy theorists are generally on the right wing fringe, including ZOG nut jobs.
All the evidence suggests that the attacks were carried out by Arab terrorists from Al Qaeda, who used box cutters to kill the crew, and took over the planes. But people seem to be in denial about this.
Another interesting sideline is the reports of Muslims celebrating the attacks, in various places around the world, although no evidence has been produced for this.