When Chet Huntley retired from the anchor chair of The Huntley–Brinkley Report
in 1970, the evening news program was renamed NBC Nightly News, and David
Brinkley co-anchored the broadcast with John Chancellor and Frank McGee.The
early years of the Nightly News never matched the popularity the Huntley-Brinkley 
Report had enjoyed. The NBC network attempted to launch several news magazine  
shows with Brinkley as anchor and none of them succeeded. He soon became 
unhappy and left NBC in 1981. He was almost immediately offered a position 
at ABC where he anchored the Sunday morning TV news program, Issues 
and Answers, later titled “This Week with David Brinkley”.  

When David Brinkley left NBC

On Wednesday September 2, 1963, CBS Evening News with Walter
Cronkite became network television’s first half-hour weeknight
news broadcast, lengthened from its original 15 minutes.

The above photo shows radio station 8MK in Detroit, Michigan going on the air August
20, 1920. The Station was located in the Detroit News Building, a common practice in
the early days of radio. The first news program was broadcast August 31, 1920. The station was later renamed WWJ and is still broadcasting at 950 on the AM dial with
a all-news format under the ownership of the CBS network.

Listening to a ready-made radio receiver in 1920

 
                (JULY 14, 191 -  OCT. 13, 1990)

Douglas Edwards was America’s first television network news
anchor beginning with the first nightly news broadcast on CBS
from 1948–1962, which was later titled CBS Evening News.