Who are Halyna Hutchins and Joel Souza?

Cinematographer Halyna Hutchins and director Joel Souza were both shot by a prop gun, fired by actor Alec Baldwin on the set of "Rust" on Thursday.

Hutchins was taken to the University of New Mexico Hospital via helicopter, where she died of her injuries. Souza was taken to Christus St. Vincent Regional Medical Center, where he is being treated for his injuries, the sheriff's office said.