"Al-Qaida has sent a message to the Iranian president, Mahmoud Ahmadinejad, asking him to stop spreading conspiracy theories about the 9/11 attacks. 'So we may ask the question: why would Iran ascribe to such a ridiculous belief that stands in the face of all logic and evidence?'"
Sounds a lot like another quote I remember hearing:
"Let us never tolerate outrageous conspiracy theories concerning the attacks of September the 11th; malicious lies that attempt to shift the blame away from the terrorists, themselves, away from the guilty."
Must have gotten the press secretaries mixed up.