I'd like to give you a global answer and then defer to NACC, which I believe is going to be here testifying on Thursday and specifically addressing Canadian airports.
Globally, what IATA has seen is that perimeter security is the weak point across very many airports. There are underdeveloped countries that don't have the infrastructure; the fences get stolen. But critical questions need to be asked when you take a look at airport security, and the first is, at what point do you start?
There's a philosophy that says we start at the cockpit and work our way out and that's the best way to secure the aviation system. Others say they're going to start at the perimeter and work their way in. Certainly what the European Union has said in the last several years is that they're going to tighten down the airports. Also, the United States has said that they're going to increase the security patrols they have and increase the amount of security their employees experience.
As for what that balance is here in Canada, I would not be the best person to ask.