Broadcast journalism revolutionized mass communication in the 20th century. Radio emerged as a powerful medium, delivering news and entertainment to millions. KDKA in Pittsburgh became the first commercial radio station in 1920, ushering in the Golden Age of Radio. Television followed, transforming how people consumed news and entertainment. The 1950s saw rapid growth in TV ownership, with networks like CBS and NBC shaping national programming. TV news evolved, introducing anchored newscasts and developing formats that continue to influence modern broadcast journalism.