Why don't US TV networks like CBS, ABC, Fox, NBC, PBS and The CW have their own digital free to air channels like in the UK/Australia etc. In Australia in the last few years networks like Channel 9 have launched free digital channels like 9go, 9gem and only last year 9Life. All other networks have recently launched several new 'subchannels'. And the UK main channels like ITV have had free digital channels like ITV2/3/4/Be for the past 10/15 years.