I mostly remember him from 20/20, but he had a lengthy career for multiple networks, and covered some of the most important events of the 1960s-2000.
https://www.nbcnews.com/news/us-new...ow-anchor-broadcasting-icon-dies-age-n1232808
https://www.nbcnews.com/news/us-new...ow-anchor-broadcasting-icon-dies-age-n1232808