[thackney]

How does the end of the train get ahead of the front of the train?

I see that. It is hard to believe that the locomotives went through before that destruction, but there was good track to haul them back through that mess towards the original parking location.

[Paladin2]

I think it likely that the locomotives have a lower center of gravity than loaded tank cars. They also have larger diameter wheels and 3 axle trucks to help them stay on the track. They may have taller wheel flanges.

It has been really rare to see any pic of the locomotive string post accident.