Illinois became the 21st state to join the United States of America.
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The 70th anniversary of NATO was marked by a gathering in London of world leaders, followed by a reception by Elizabeth II at Buckingham Palace.
State troopers in Victoria, Australia, killed more than 30 gold miners at the Battle of the Eureka Stockade.
Neon lighting was first demonstrated at the Paris Motor Show by Georges Claude.
NASA lost radio contact with the Mars Polar Lander moments before the spacecraft entered the Martian atmosphere.
The US Defense Secretary announced that the US Military would open all combat roles to women.
