Predator missile strike? Delta Force hit-and-run deep behind enemy lines? Nope. Better: The senior al Qaida operative who helped direct the 2005 London subway bombings and a plot to blow up commercial airliners over the Atlantic Ocean has died in Pakistan’s tribal region, U.S. counter terrorism officials said Tuesday.The senior militant, an Egyptian who used the nom de guerre Abu Ubaida al-Masri, recently succumbed to hepatitis, they said. Never heard of him? Most people haven’t. The Times devoted a few paragraphs to him in a story last May about the next generation of Al Qaeda leadership, but I can’t even...