Dozens of children would grow up without a mother or a father, an aunt or uncle, a grandmother or grandfather. Parents would grow old without a daughter or a son; husbands, wives, and partners would be forced to carry on alone. Grief would grip untold families, friends, colleagues, and strangers, wounded by the deaths of seventy-six passengers and eleven crew members, all murdered by five al-Qaeda hijackers aboard American Airlines Flight 11.