Somebody overpowered a TV station's tower in 1987 and PBS Chicago has never foun

This is my favorite because it's pure signal-hijack and it's MODERN, not some foggy 1800s tale. Nov 22 1987, Chicago. Twice in one night someone overrides broadcast TV signals. First WGN during the 9pm news, ~17 seconds of a guy in a Max Headroom mask swaying in front of a corrugated panel before en……