Cinematographer Halyna Hutchins is dead after Alec Baldwin fired a prop gun on the set of the movie “Rust.”

The gun reportedly — and inexplicably — contained a single live round.

Who on earth would put a live round in a prop gun? Science publisher Johannes Velterop has a theory:

Should there be a line of inquiry, Johannes? You really think so?

“But it’s America”? What the hell is that supposed to mean?

A hall-of-famer, to be sure.

We concur.