Ayman al-Zawahiri, considered Osama bin Laden's top aide, has been killed in Afghanistan, Russia's ITAR-TASS news agency reported yesterday, citing informed sources. In a report from Islamabad, the agency cited sources as saying that al-Zawahiri was not killed in fighting but in a special operation carried out by unidentified individuals. It did not give any date. On September 11, a London-based Islamist said al-Zawahiri had recently married two widows of a comrade killed in the US-led campaign in Afghanistan. An Afghan military chief said in December 2001 that Zawahiri had been injured and possibly killed in an air attack near...