Wall Street Crash (1929)
http://www.youtube.com/watch?v=RJpLMvgUXe8&feature=BFp&list=PL524A96551AAE5495&index=1
Discovery of Penicillin (1928)
http://www.youtube.com/watch?v=XOph1n1Mdls&feature=BFa&list=PL524A96551AAE5495&index=2
Treaty of Versailles (1919)
http://www.youtube.com/watch?v=gKzZ1OwPXgk
Rise of the Nazis
http://www.youtube.com/watch?v=a2YEUhHFMHY&feature=fvwrel
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