1930-67B: The trading floor of the New York Stock Exchange six months after the crash of 1929. (public domain)

Page source: http://hoover.archives.gov/exhibits/Hooverstory/gallery06/ archive copy at the Wayback Machine

Image source: http://www.ecommcode2.com/hoover/research/photos/images/1930-67B.gif archive copy at the Wayback Machine

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