Today's letters: Debriefing a spy, considering that trade deal

More on the spy who settled in Ottawa
Re: A double agent at the door, Oct. 1.
Thank you for again publishing details about Operation Keystone and Soviet-era deep cover KGB illegal Yevgeni Brik and disgraced RCMP officer, the late James Morrison. This case, six years after the defection of Soviet GRU cypher clerk, Igor Gouzenko, was considered one of the most important Canadian counter-espionage cases during the early years of the Cold War. In June 1992, I was the CSIS officer who lead the operat