The ten millionth patent, a specialized laser radar, was issued by the US Patent and Trademark Office.
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Benito Mussolini was arrested in Switzerland for a violent strike. He spent two weeks in jail and was deported to Italy.
Father's Day was celebrated for the first time in the US.
Thousands of pigeons went missing after a freak weather incident.
President Lincoln signed an Act that made slavery illegal in US territories.
The US Supreme Court struck down a Louisiana law that required schools to teach creationism.
