[xanadohnt]

There must be 1000s of places along train tracks in the US alone where a strategically-placed derailing device[1] could wreak the same, if not more, terror. I'm unconvinced planes pose a greater risk to life loss and that is the point IMO.

1. https://en.wikipedia.org/wiki/Derail

[duderific]

I seriously doubt a derailing train could take down an entire skyscraper.

[kfunk]

I doubt an airplane ever has.