Television's most powerful moments

Associated Press
Whitney Houston arrives at the 17th Carousel of Hope Ball benefiting the Barbara Davis Center for Childhood Diabetes in Beverly Hills, Calif. Coroner's officials said Thursday, March 22, 2012, that Houston drowned, but her death was also caused by heart disease and cocaine use that suggested she was chronically using the drug. Houston died Feb. 11, in California at the age of 48. (AP Photo/Matt Sayles)

View gallery

20 photos

According to a new study released by Nielsen, the Sept. 11 terrorist attacks, Hurricane Katrina and the O.J. Simpson verdict were among the most "impactful" moments in television history. Here are some of them.

View Comments (0)