That's a very, very good question, and I appreciate that I have the opportunity to inform this committee.
When the New York attacks occurred, it was a shock to everybody. There was an initial reaction that everybody wanted to implement all sorts of measures quickly.
My approach, and our approach in the company, has been to work with the front-line employees--that's where it happens--on programs of awareness and alertness. You observe what people do and how they behave. We developed this program in conjunction with the RCMP, and it was very, very effective.
You wouldn't believe the number of incidents that were avoided because our staff were alert and saw somebody do something or behave in a certain way. For instance, people coming to pay for tickets to go from Toronto to Vancouver, which is valued at $1,200, with a pile of brand new $20 bills. That sort of thing triggers you. It's an exaggeration, but sometimes that's how you do it.
With someone checking in a big bag, such as a hockey bag, you think it would be full and very heavy, and it's very light and fluffy. You open it, and in fact it's fluff stuff inside. It's that strategy of alertness.
Railway networks are such that people can get on at different places. They are very accessible, very difficult to protect, and I'm not sure it's cost efficient to justify significant investments. Our people on the front line are the key for us.