NEW YORK (AP) — The tragedy that unfolded on a New Mexico movie set when Alec Baldwin fired a prop gun, killing a cinematographer, has led to calls for fundamental change in Hollywood. Some are saying real guns should be banned on sets. From a change.org petition to a network TV drama that has banished real weapons from the set, supporters of the move say there is no justification for taking any risks when computers can create gunshots in post-production. Halyna Hutchins was killed when Baldwin fired a weapon that a crew member told him was safe.