"WHY HASN'T THE U.S. KILLED BIN LADEN'S WINGMAN AYMAN AL-ZAWAHIRI?" NBC NEWS
“Five years after he succeeded Osama bin Laden as leader of al Qaeda, Ayman al-Zawahiri is still not dead. Experts, who can't agree on whether he's a has-been or a mastermind, can at least agree on one thing: he's very good at hiding.” This article details the lengths that Zawahiri has gone to in order to escape detection and the ongoing debate about his continued relevance as a target.