I wonder then if I could maybe turn the question over to Mr. Sela.
If Professor Salter is right and we're looking at an entirely different system because of the conditions, in a country like ours, where we have in excess of 60 million passenger movements per annum, I'm wondering whether the advanced check--which I guess Professor Salter refers to as “profiling”—of potential or frequent passengers is, first, feasible in Canada, and two, desirable to look at 60 million-plus passengers and try to build a profile of the security risk for each one of them?