America's Deadliest School Shootings

Seventeen people shot to death at Marjory Stoneman Douglas High School in Parkland, Florida are the latest victims in a long line of shootings that have played out at schools across the country. One of the earliest incidents took place in 1966 at the University of Texas in Austin, where a gunman positioned himself on the observation deck of the UT Tower and took aim at people below. InsideEdition.com's Lisa Voyticki has more.