The lobby contains what security experts call a "mantrap."

Guards monitor these bomb-proof doors, along with exterior video cameras and a device that sniffs the mail. Windows are laminated with plastic, so an explosion would not send glass shards slicing into offices. Massive concrete barriers could stop a truck.

Welcome to the American Jewish Committee's home in New York. This isn't mere "ethnic panic." No, "lethal anti-Semitism" is on the rise, even in places long thought to be safe, noted Gabriel Schoenfeld, senior editor at Commentary magazine.

This will not be an ordinary Passover.

"More synagogues have been destroyed in France in the past five years by acts of desecration