The circumstances of the fatal shooting of cinematographer Halyna Hutchins by Alec Baldwin on the set of the film "Rust" are under investigation.
The incident has raised questions about gun safety on Hollywood sets and the rules surrounding the use of prop firearms.
Here's a look at the way safety guidelines for weapons work and how they may relate to what happened on the set of "Rust".
Check out The China Report, our new weekly newsletter. Subscribe here!