The next terrorist strike against the United States could be more deadly and disruptive than the Sept. 11 attacks, former top government officials, academics, and business leaders warn in a new report. ''America remains dangerously unprepared to prevent and respond to a catastrophic terrorist attack on US soil,'' said the task force led by former senators Gary Hart, a Colorado Democrat, and New Hampshire Republican Warren Rudman. The report was released late yesterday. Few ships, trucks, and trains that enter the United States are searched, the report said. Emergency personnel are unprepared for chemical or biological attacks. Oil refineries and...