Las Vegas is well-known as a center for tourism and casino gambling. Many of the top entertainers from around the world grace stages throughout Las Vegas, making it a celebrity center. Las Vegas rose to prominence in the 1930s when casino gambling was legalized there. Las Vegas is also a key producer of electricity from nearby dams. Las Vegas is often in the news for being politically liberal about issues such as prostitution, gambling, and marijuana legalization. Las Vegas is a feature in sports news for arena sports such as mixed martial arts (MMA) showdowns and celebrity boxing matches. Popular movies set in Las Vegas include Rain Man, Casino, Showgirls, and Fear and Loathing in Las Vegas.