Fact: The attacks of September 11, 2001, brought terror to our doorstep. Fact: Suicide bombers, attacks on mass transit, the leveling of hotels and nightclubs followed elsewhere.Fact: Terrorists’ endgame is maximum civilian casualties through minimum effort.Question: What’s next? Haggai Carmon’s timely new intelligence thriller, The Red Syndrome, describes a plausible and frighteningly simple terrorist conspiracy: Introduce a lethal biological weapon into the nation’s food supply in a way never before imagined. Which Americans belong to the Iranian-backed Islamic fundamentalist splinter group that threatens the U.S. population? Can they be stopped?