Program Description:When RCA debuted television at the 1939 World's Fair, the new invention set the crowd abuzz. A few years later the magic box began decorating dens and living rooms across the country, and daily life in America has never been the same since. Today there is hardly a home without a television, and hardly an event without a television camera nearby. Television is the primary source of both news and entertainment for a majority of people, but how many of us understand how this wondrous invention works? "Understanding: Television" takes you on a journey through the boob tube.