Western films play an important role in the history of American films. They are set in the American West. Most of the heroes are from famous novels. They speak highly of people's spirit, courage and building everything all by themselves. Early western films were mostly filmed in the studio, just like other early Hollywood films. With the development of technology, it began to be filmed at movie   ranches  from the 1930s. Often, the vast  _ becomes a character  in the film. After the early 1950s, various  wide screen technologies began to be used. During this time, the most typical western films focused on huge plains, soldiers or tourists, they were always the most handsome men. Until recent times, western films seem to be a little out of date. For example, the guns are always some old ones. They were frequently  used in films set in the 1870s. In the late 1960s, things began to change. Some new guns began to show in the films. According to the passage, which of the following sentences is NOT true?
They are set in the American West. Western films only focused on soldiers. Early western films were mostly filmed in the studio. Guns are an important part in these films.