I was actually an adviser on the Arar commission, through Justice O'Connor, and that was a pretty vivid example of what can go terribly wrong for an innocent Canadian citizen when data is shared indiscriminately and without the kinds of controls. There is, I think, a constant pressure to push against the constraints on that information sharing. I think, in all of these things, on the one hand, clearly, connecting the dots and putting information together and so on, we saw in 9/11, that the FBI and the CIA, etc., weren't talking to one another, and that trails had stopped and so on.
Information sharing is an important tool of counterterrorism. But you have to keep your eye all the time on information sharing that is carried out without the appropriate constraint and without an appropriate sense of what is actually sensible in terms of gathering data and what will actually contribute out of that data collection to effective counterterrorism.