Iowa became the 29th state to join the United States of America.
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Scarlett Johansson made her debut on Broadway.
The first American test-tube baby, Elizabeth Jordan Carr, was born in Norfolk, Virginia.
LinkedIn was founded by Reid Hoffman and the founding team members from PayPal and Socialnet.com.
The first major rock festival held on America's east coast took place.
NASA's James Webb Space Telescope began the multi-day process of unfurling its sunshield.
