Iowa became the 29th state to join the United States of America.
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Muriel Siebert became the first woman to own a seat on New York Stock Exchange.
The first major rock festival held on America's east coast took place.
LinkedIn was founded by Reid Hoffman and the founding team members from PayPal and Socialnet.com.
President Richard Nixon signed the US Endangered Species Act into law.
Hong Kong began to slaughter the city's 1.6 million chickens to stop the spread of an influenza strain.
