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The German liner SS Kaiser Wilhelm der Grosse becomes the first ship to send wireless signals to shore.
Roughly four million people, mostly students, demonstrate across the world to address climate change. Sixteen-year-old Greta Thunberg from Sweden leads the demonstration in New York City.
A mass shooting occurs at Saugus High School in Santa Clarita, California, resulting in three deaths, including that of the perpetrator, and three injuries.
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