Zawahiri Killed?

Via MSNBC.com:

U.S. officials told NBC News on Friday that American airstrikes in Pakistan overnight Thursday were aimed at the No. 2 man in the al-Qaida terror organization — Ayman al-Zawahri.

One official said intelligence indicated a strong possibility that Zawahri was in the Pakistani village at the time of the airstrike, but there is no confirmation that he was killed.

Pakistani officials say U.S. aircraft, apparently CIA Predator drones, fired as many as 10 missiles at the residential compound.

Interestingly enough, a Predator circling overhead was able to capture this image seconds before the missile strike, with subtitles.

Osama bin Laden hasn't been heard from in over a year, and some sources think he died of kidney failure in mid-December and was buried in Iran. If the DNA squeegeed off surrounding rocks verifies that Zawahiri was killed, who does that leave in charge of al Qaeda?

Update: Here.