Construction began on the Hoover Dam in Nevada.
It was originally called the Boulder Dam.
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NASA's Opportunity Mars rover launched from the Florida Cape Canaveral Space Force Station.
The world celebrated the introduction of sliced bread for the first time.
Dutch artist Wilfred Stijger broke the world record for the tallest sandcastle.
Tourists in Kazakhstan beat a seal unconscious on a beach so that children could take pictures with it.
The London bombings took place.
