A five-part series that starts at 8 p.m. Tuesday on WEDU-Ch. 3 will explain how some of the world's major engineering accomplishments were created: bridges, domes, skyscrapers, dams and tunnels.

So after his regular early-evening news report for PBS, The NewsHour With Jim Lehrer, he'll begin anchoring convention coverage from 8 to 11 p.m. (or later) Monday through Thursday.

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