Complex sentence: He joined CBS News in 1966 and stayed there until December 1981, serving as co-anchor of the "CBS Morning News" (with Lesley Stahl) from 1977 to 1979.
Split into simpler sentences: He joined CBS News in 1966 and stayed there until December 1981. He was also the co-anchor (with Lesley Stahl) of the CBS Morning News from 1977 to 1979.