Police arrest 19 in terror probe Citizenship officer triggered alarm One man enrolled in flight school MICHELLE SHEPHARD AND BETSY POWELL STAFF REPORTERS A man enrolled in a flight school — where training involves flying over the Pickering nuclear power plant — is one of 19 people being held in a Toronto-area jail while federal officers investigate possible links to terrorist groups. Police from several forces acting in partnership with Citizenship and Immigration Canada conducted pre-dawn raids throughout the Toronto area last week, arresting some of the men on alleged immigration violations while others are now being held without any...