Thank you for your question, MP Badawey.
This was during the Christmas season, of course, December 23 and 24, and December 23 was our heaviest travel day of the year. All of our available equipment was in service. Of course, this impacted the next day's service, because we didn't have additional equipment to move into the cycle until the CN derailment occurred, when we could no longer provide that service.
In a situation where we did not have all capacity in use, in a winter readiness we would try to stage guard trains. We did have guard equipment at facilities, but we weren't in a position to reach those locations with that equipment at that time.