UK Prime Minister Liz Truss resigned after only 44 days in office, the shortest term in the country’s history.
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Queen Elizabeth II led the Sydney Opera House's grand opening.
NTC forces killed Muammar Gaddafi and his son after the Battle of Sirte.
The Lancet published a study that found pollution contributes to 1 in 6 deaths worldwide.
Maria Theresa – the only female to rule the Habsburg Empire – became queen following her father's death.
The United States ratified the Louisiana Purchase.
