The History Of World's Fairs

from National Public Radio
May 5, 2010

As the Shanghai World Expo kicks off, we take a look back at the lasting legacy of past world's fairs. Many products we use every day gained their fame at the fairs: escalators, televisions, Campbell's soup. Robert Siegel talks to Montana State University history professor Robert Rydell, who's written extensively on the expos of the early 20th century.

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