The Huntley-Brinkley Report (sometimes known as The Texaco Huntley-Brinkley Report, for one of its early sponsors) was the NBC television network’s flagship evening news program from October 29, 1956 until July 31, 1970. It was anchored by Chet Huntley in New York City, and David Brinkley in Washington, D.C. It succeeded the Camel News Caravan, anchored by John Cameron Swayze. The program ran for 15 minutes at its inception but expanded to 30 minutes on September 9, 1963, exactly a week after CBS Evening News with Walter Cronkite did so. It was developed and produced initially by Reuven Frank. Frank left the program in 1962 to produce documentaries (Eliot Frankel replaced him) but returned to the program the following year when it expanded to 30 minutes. He was succeeded as executive producer in 1965 by Robert “Shad” Northshield and in 1969 by Wallace Westfeldt.
Wikipedia provides the best quality background on the early days of NBC News and the creation of Huntley-Brinkley: http://en.wikipedia.org/wiki/Huntley-Brinkley_Report
Other key figures in the development of NBC News: