Mughniyah had grown pudgy, his beard graying beneath round-rimmed glasses. He lived on the run among Iran, Syria and Lebanon and had two wives: a Lebanese in southern Lebanon and an Iranian in Damascus. He drove his own car, bought groceries alone and took catnaps while working nonstop, associates said. An associate in Damascus recalled how, during a heated group discussion, he curled up on a couch and went to sleep.
He oversaw foreign networks that he built after his terrorism campaign in Lebanon, including the 1983 bombings of the U.S. Embassy and Marine barracks. His cells allegedly carried out operations in France and Argentina, where two car bombings of Jewish targets left more than 100 dead. He also met in Sudan in the early 1990s with Osama bin Laden, whose militants got explosives training from Hezbollah experts.
Pursued by Israeli and U.S. forces, Mughniyah eluded several assassination attempts. His brother died in one attack in 1994; Mughniyah's bulletproof vest took multiple hits in another ambush.
In the late 1990s, Hezbollah curtailed attacks outside the Middle East. Mughniyah was an architect of a shift to concentrate on political and military activity in Lebanon. He served on the shura, the militia's leadership council, after being elected in 2001 under the alias Jawad Nur A-Din, Western officials say.
His post was secret, officials say, because Hezbollah claims to separate its political activity from its military wing, which is designated as a terrorist group by the United States and Israel.
Mughniyah's duties included aiding Palestinian militant groups with training and arms procurement, and running security for Hezbollah leader Sheik Hassan Nasrallah, to whom he was close, experts and associates say.
On May 13, 2006, he met in Lebanon with Hassan Zarkani, a representative of Iraqi Shiite strongman Muqtada Sadr, and agreed to provide smuggled anti-tank missiles to Iraqi fighters and train them in their use, Western anti-terrorism officials say.
But his prime obsession was the destruction of Israel. Hezbollah insiders and Israeli officials say that during the 2006 war in Lebanon, he ordered battlefield tactics that surprised Israeli troops with their ferocity and effectiveness.
"We saw death in their eyes," Mughniyah said of the Israelis, whose fighting skills he admired, according to Lebanese journalist Amine.