Professor Henry Koffman in Modern Marvels: Cranes
Professor Koffman is an expert media consultant for radio, television and the History Channel. He has appeared in many series of the History Channel particularly Modern Marvels. He has also appeared on the Larry King Live Show and numerous national and local television and radio news broadcasts.
This video is from the History Channel's Modern Marvels - Cranes.
It is a clip of some of his speaking parts.
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