Let's say you, a railyard worker loads a train and watches it go to cross the border and it returns. Okay then, you'd surmise that you would have to unload it. But you are given orders not to. Instead, the train departs to cross the border again. And yet again with the same load of biodiesel, it returns. And does it twenty-four times.

So you're thinking, what's going on? Somebody is making a buck but who? That's a big cost. Who's bearing it?

CN Rail's mysterious 2.6 million dollar trips.