There are a few things.
First of all, we are considering this a watching brief, and we have received assurances from CATSA that they will look at every possible technology that could make this less privacy-intrusive, such as the possibility, one day, that it not be seen by a human being. They have already told us that they're looking into that.
In relation to the U.S., as the commissioner has mentioned, they do not have quite the same policies that we have. In fact, the privacy advocates in the U.S. have called for exactly what has been implemented in Canada, meaning optional.