Mr. Chair, in fact it took longer than that, because the first recommendation that we made with respect to physical defences in that respect goes back to 2000, and in 2013 we updated it with the Burlington accident you've just mentioned.
We are very anxious to see what the details are going to be on this notice of intent. We feel it's very important. There are about 30-plus occurrences a year. Not all of them result in accidents and derailments, but the risk of a catastrophe is there as long as we rely strictly on a human being to follow the rules.