Taken from MSNBC.com
Al-Qaida deputy Ayman al Zawahiri appeared in a new propaganda video late last month, lamenting the killing of a high-ranking member of the terror network. Not that long ago, analysts at the CIA would have combed the video for hidden messages - possible “go signals” for terrorist attacks.

Was there something sinister inserted in the Koranic verse at the beginning of the tape, they might wonder, or did the video itself mask an embedded message? Analysts still do textual and video analysis of al-Qaida statements, but the likelihood that messages were secreted in the video is not as high as once thought.