The Westminster Abbey in London was consecrated.
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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.
The first major rock festival held on America's east coast took place.
Andrea Bocelli made his classical debut singing at a concert at Teatro Romolo Valli in Reggio Emilia.
Iowa became the 29th state to join the United States of America.
