Beyond al-Qaeda schemes to blow up civilian aircraft using explosives, another threat to commercial planes has emerged in the past few months — namely, the spread of shoulder-fired anti-aircraft missiles from Libya after the overthrow of Moammar Gaddafi’s regime, David Ignatius writes Tuesday, May 8, in The Washington Post. A State Department official said in February that Gaddafi had acquired 20,000 of these weapons, and that only 5,000 of them had been secured through a $40 million U.S. program to buy up loose missiles. What’s more, technicians recently refurbished 800 of these man-portable air-defense systems, known as MANPADS, some for an African jihadist group called Boko Haram, often seen as an ally of al-Qaeda, for possible use against commercial jets flying into Niger, Chad and perhaps Nigeria.