I have seen no reports that even remotely characterized this accident as a terrorist act.
I have not either, the day of the accident there was speculation, but after that They just say they were trying to find out why the driver only applied the brakes at the last second.
A lot of people are unaware that late model vehicles have a "black box" it's part of the vehicle computer, it tracks speed, braking, motor rpm, airbag deployment, Etc.
Not sure what year the truck was though it may have had it.
NM