Groundbreaking TV moments: Vice President Dan Quayle attacking “Murphy Brown” for its portrayal of single motherhood, Ellen DeGeneres’s sitcom hit “Ellen” and the highly anticipated coming out episode, Kanye West’s infamous off-script moment in 2005 on NBC’s telethon “Concert for Hurricane Relief,” Oprah Winfrey’s 1988 weight loss reveal on her iconic talk show. Explore the most impactful moments in TV history. "TV on the Edge: Moments That Shaped Our Culture" premieres Sunday at 9p ET/PT on CNN

CNN went on the air for the first time 40 years ago on June 1, 1980. Here’s a look back at some of the most defining stories from the last four decades. https://cnn.it/3gJ560b | CNN