Which event involved a shooter killing 15 people from a clock tower in 1966?

The event that involved a shooter killing 15 people from a clock tower in 1966 is the University of Texas shooting. On August 1, 1966, Charles Whitman climbed to the top of the University of Texas Tower in Austin and opened fire on people below, resulting in multiple fatalities and injuries. This tragic incident marked one of the first mass shootings in U.S. history that garnered widespread attention, highlighting issues related to gun violence and public safety.

The other events mentioned, while also significant in the context of mass shootings, occurred in different locations and circumstances. The Columbine High School Massacre took place in 1999, the McDonald's Massacre occurred in 1984, and the San Ysidro shootout happened in 1984 as well. Each of these events has its own distinct narrative and impact on public discussions around gun control and safety.