“That theory might be true,” said Ugur Tezer, a 48-year-old businessman who sells floor tiles in the Turkish capital, Ankara. “When I first heard about the attack I thought, ‘Osama,’ but then I thought the U.S. might have done it to suppress the rise of Muslims.”…

Controversy over U.S. actions and policies, including the widely discredited assertions that Saddam Hussein had weapons of mass destruction, reinforced the perceptions of conspiracy theorists. Iranians dug deeper into history, recalling the U.S.-backed coup in their country in 1953.

“Initially, I was doubtful about the conspiracy theories. But after seeing the events in later years, I don’t have any doubt that it was their own operation to find a pretext to hit Muslim countries,” said Shaikh Mushtaq Ahmed, a 58-year-old operations manager in a bank in Pakistan. “It’s not a strange thing that they staged something like this in their own country to achieve a big objective.”