King George I of Greece was assassinated while out on a walk in Thessaloniki.
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The first public Bat Mitzvah was held in New York City. It was for a girl named Judith Kaplan.
The Pedaliante, a human-powered aircraft, successfully flew 0.62 miles (1 km) in Milan, Italy.
Cosmonaut Alexey Leonov made the first spacewalk when he left his Voskhod 2 spacecraft.
The UK government recognized British Sign Language (BSL) as an official language.
The Lake Merritt Wild Duck Refuge became the first US wildlife sanctuary.