The story on how the fire started is interesting, and the fact that they are focused on these events is interesting, general reporter ignorance or not.

It is my experience that the engine didn't simply fall off the train it was supposedly coupled to?

I am still suspect that someone may tried to cut the burning engine away from the cut (burning engine-next to oil cars-doh!) and may have inadvertently bottle the air.

99,999% of the time, it was my limited experience, that if the cut had a set and the engine cut away, it would still big-hole the cut. Unless, that is, someone bottle the air? And, if that had happened, the probability of the cut bleeding off in under 30 minutes would be very low.

Was the train bunched or stretched?

Did someone pull the pin on the engine and/or the cut?

The article mentions "insufficient" hand brakes, so how many, if any were set?

I still think this is going to be an interesting final report.