How alarmed were New Jersey officials by reports of Muslims dancing in the streets of Jersey City and Paterson on Sept. 11, 2001, to celebrate the destruction of the World Trade Center? They feared riots would break out and were ready to send in the National Guard and the State Police to preserve order.But John J. Farmer Jr., then the New Jersey attorney general and the state's chief law enforcement officer, said on Tuesday that he ordered an investigation that very day and found the reports to be bogus, more wild stories born in the stricken hours after the attacks....