We are ruled by idiots.
Terrorists hijack planes because that is almost the only way you can make the nightly TV news with an airplane.
But who would hijack a train? That would be stupid even beyond what we see in DC.
Explosives set off under a bridge, which is over deep water or a canyon, would be the way to cause big damage to a train.
You will take this train to Cuba or else. I demand a million dollars and a hand cart. LOL