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Twenty year old Daunte Wright is shot and killed in Brooklyn Center, Minnesota by officer Kimberly Potter, sparking protests in the city, when the officer allegedly mistakes her own gun for her taser.
In Saint Petersburg, Russian scientist Alexander Stepanovich Popov demonstrates to the Russian Physical and Chemical Society his invention, the Popov lightning detector—a primitive radio receiver. In some parts of the former Soviet Union the anniversary of this day is celebrated as Radio Day.
Instagram, a mainstream photo-sharing application, is founded.
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