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Stuart Brown, founder of the National Institute for Play, began studying play in 1966, when he was tasked with figuring out a motive behind the Texas Tower shooting.

Survivors from the University of Texas tower shooting came out and told their story.

In 1966, Bill Helmer wrote a first-person account of witnessing the University of Texas tower shooting.

I hid from the Texas Tower sniper.

Here in America, it has been 56 years since one of the first gun massacres, the University of Texas tower shooting in 1966 that claimed 17 lives.