As hands are wrung in the aftermath of the near-tragedy on a Northwest Airlines flight approaching Detroit, a conversation from London's Heathrow Airport in 1986 comes to mind. It consisted of an El Al security agent quizzing one Ann-Marie Doreen Murphy, a 32-year-old recent arrival in London from Sallynoggin, Ireland. While working as a chambermaid at the Hilton Hotel on Park Lane, Murphy met Nizar al-Hindawi, a far-leftist Palestinian who impregnated her. After instructing her to "get rid of the thing," he abruptly changed his tune and insisted on immediate marriage in "the Holy Land." He also insisted on their...