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Walter Cronkite during Walter Cronkite Keynotes at Columbia University - February 8, 2007 at Columbia University in New York City, New York, United States. (Photo by Joe Kohen/WireImage)

Walter Cronkite during Walter Cronkite Keynotes at Columbia University - February 8, 2007 at Columbia University in New York City, New York, United States. (Photo by Joe Kohen/WireImage)