President Richard Nixon signed the US Endangered Species Act into law.
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Iowa became the 29th state to join the United States of America.
The Westminster Abbey in London was consecrated.
Scarlett Johansson made her debut on Broadway.
LinkedIn was founded by Reid Hoffman and the founding team members from PayPal and Socialnet.com.
NASA's James Webb Space Telescope began the multi-day process of unfurling its sunshield.
