Christopher Glenn, a longtime CBS news correspondent who anchored coverage of the space shuttle Challenger explosion and was the voice of the children's program "In the News" in 1970s and 80s, has died. He was 68. He anchored and reported on many national stories including space shuttle missions and served as a floor reporter at national political conventions. It was Glenn who anchored the Jan. 28, 1986, launch of the doomed shuttle Challenger and delivered an anguished commentary as the spacecraft exploded shortly after lift off. His distinctive voice was familiar to those who remember the Emmy-award winning "In the News." The 2½-minute feature on one topic was broadcast every half hour during Saturday children's programming on CBS. It debuted in September 1971 and ran for 5,000 episodes over 13 seasons.