President Richard Nixon signed the US Endangered Species Act into law.
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Vladimir Putin signed a law banning the US adoption of Russian children.
Scarlett Johansson made her debut on Broadway.
The Westminster Abbey in London was consecrated.
Muriel Siebert became the first woman to own a seat on New York Stock Exchange.
LinkedIn was founded by Reid Hoffman and the founding team members from PayPal and Socialnet.com.
