UK Prime Minister Boris Johnson resigned after numerous Conservative Party members voiced their lack of confidence in him.
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Construction began on the Hoover Dam in Nevada.
Jesse James and the famous James-Younger Gang robbed the Missouri Pacific Railroad near Otterville, Missouri, US.
The world celebrated the introduction of sliced bread for the first time.
The famous Great White Fleet left San Francisco to continue its around-the-world journey.
The London bombings took place.