President Barack Obama officially declared his support of same-sex marriage.
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The United States became the first country to legalize a birth control pill.
John Burr patented a better rotary blade lawn mower, designed with traction wheels and a rotary blade that would not easily get stuck with grass clipping.
The Huffington Post was launched, founded by Arianna Huffington, Andrew Breitbart, Kenneth Lerer, and Jonah Peretti.
Five bank robbers armed themselves and attempted a heist in Norco, California.
A stampede killed 129 people in Ghana.
