Iowa became the 29th state to join the United States of America.
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Andrea Bocelli made his classical debut singing at a concert at Teatro Romolo Valli in Reggio Emilia.
The Westminster Abbey in London was consecrated.
Hong Kong began to slaughter the city's 1.6 million chickens to stop the spread of an influenza strain.
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.
