Kevin G shot a video of CN 306 arriving at Gordon Yard on Thursday, June 21. The freight had CN 2246 and 2633 on the head end, with a DPU* unit CN 2234) roughly mid-way through the 99-car train.

Here's the head end arriving at the yard.


And the tail end in this video. You see 2234 one minute into the video.


* DPU = Distributed Power Unit? A remotely-controlled locomotive in the middle or end of a train to provide additional pulling/pushing power and/or more braking power.