INSIGHT-Is the public kept in the dark about Canadian air safety issues?
August 20, 2015 at 01:00 AM EDT
TORONTO, Aug 20 (Reuters) - Regulators threatened to ground Canada's Porter Airlines over safety problems in 2008, according to documents reviewed by Reuters, but the matter was kept secret for years - a sign, some critics say, of how little the public is told about the safety of Canadian airlines.