Action films originated in the 1920s-1930s as adventure films, then evolved to include war and western genres. The Bond films in the 1960s came to dominate the genre. Popular actors of the 1980s like Arnold Schwarzenegger and Sylvester Stallone helped make action films famous. Common directors include Christopher Nolan for intricate plots and Michael Bay for high-budget spectacles. Jerry Bruckheimer and Joel Silver are prolific producers of the genre. The target audience is typically male teens to young adults, but the genre appeals more broadly, with some films like "Salt" targeting female viewers. Action films conventionally feature fights, weapons, missions, and fast-paced scenes with violence and explosions.