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.
Iowa became the 29th state to join the United States of America.
Muriel Siebert became the first woman to own a seat on New York Stock Exchange.
Andrea Bocelli made his classical debut singing at a concert at Teatro Romolo Valli in Reggio Emilia.
The first major rock festival held on America's east coast took place.
