Of cyclopses, sideshows and Cronkite

The first time TV regularly shared Walter Cronkite’s history-changing voice, he was a clumsy-looking bystander. Not his fault. Everything about CBS’s “You Are There” was clunky. In black and white, it took us to relive moments in history on sets every bit as authentic as Flash Gordon’s spaceship. When Cronkite became America’s preeminent newsman and…