From Eli Lake’s piece in the New York Sun about the assassination of Abdul Sattar al-Rishawi, a Sunni sheik who has been fighting with U.S. forces against al-Qaeda.

A military officer monitoring the situation closely said the early forensic reports on yesterday’s attack suggest the work of Osama bin Laden’s organization because of the sophisticated nature of the bomb, which evaded electronic countermeasures and bomb-sniffing dogs. “The working theory is that a senior, highly trained Al Qaeda operative disguised himself as a beggar and managed to slip the bomb under the sheik’s car,” the officer, who requested anonymity, said.