Today, reports surfaced that the leader of al-Qaida in Iraq, Abu Ayyub al-Masri, had been killed in fighting between Sunni insurgent groups.
The United States did not confirm the reports, and a coalition of insurgent groups claimed al-Masri is alive. But the incident points toward the escalating tensions between al-Qaida in Iraq and other Sunni insurgent groups.
Political scientist Marc Lynch tells Robert Siegel that last October, al-Masri's group fueled those tensions last October by declaring hegemony over the other Sunni insurgent groups.
Lynch, of Williams College, follows Sunni insurgent groups through statements and videos on their Web sites.