In the late 1970's, the Russian Woodpecker plagued the world's radio waves. The Russian Woodpecker was a shortwave radio signal that sounded like a series of sharp taps – ten per second – and disrupted public broadcasts as well as communications of boats, airplanes and utilities worldwide. In the chill of the Cold War, people wondered if the Russian Woodpecker might be some insidious attempt at mind control, but the source of the signal was actually a huge Soviet radar array known as the Duga.
On August 1, 1966, a sniper opened fire from the University of Texas Tower in Austin, shooting 49 people. The harrowing and emotional film Tower is the first factual documentary made about this massacre, and takes the unusual step of putting the perpetrator aside and letting survivors tell their stories.