The boys are at it again.

Will they ever learn?

Osama bin Laden's deputy, Ayman al-Zawahiri, accused Iran of trying to “discredit” al-Qaeda by spreading a conspiracy theory, widely held in the Middle East, that Israel—and not al-Qaeda—was behind the attacks on America in September 2001. Mr Zawahiri had previously accused Shia Iran of seeking to spread its influence in the Middle East at the expense of the Sunnis.

- The Economist April 2008