No need to apologise, sir. Besides, Canada does deserve at least some besmirching for its own part in handling of Maher Arar. The Prime Minister still has not apologised to him for what happened (though the RCMP head has done so -- day before yesterday, I believe).

Also, whether the US tortures someone, or sends the victim to a place where they know they will be tortured, it amounts to the same, morally, as far as I am concerned.