Hong Kong began to slaughter the city’s 1.6 million chickens to stop the spread of an influenza strain.
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The first American test-tube baby, Elizabeth Jordan Carr, was born in Norfolk, Virginia.
President Richard Nixon signed the US Endangered Species Act into law.
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.
Iowa became the 29th state to join the United States of America.
