Alec Baldwin and the "Rust" Tragedy: What Exactly Does a Prop Bullet Have?

Following the shock of the tragedy on the set of "Rust," where an American actor Alec Baldwin shot with a prop gun killed cinematographer Halyna Hutchins, a key question arises about how these weapons work.

At CNN Redacción, a specialist explains to us what the bullets used in movies have and how they differ from the real ones.