Some were young schoolboys, others were so old that the
silhouettes of their bodies looked bent against the sky.
All of them were armed, with anything they had found.

........They had come, un-summoned, to guard this train."

- an experience of Dagny Taggart,
railroad executive in the novel Atlas Shrugged by Ayn Rand,
riding in the locomotive cab during the first run of the pioneering John Galt Line.