1974 – In an informal article in a medical journal, Henry Heimlich introduced the concept of abdominal thrusts, commonly known as the Heimlich maneuver, to treat victims of choking.
1784 – Élisabeth Thible became the first woman to fly in an untethered hot air balloon, covering a distance of 4 km (2.5 mi) and reaching an estimated altitude of 1,500 m (4,900 ft).
1897 – The Ancient Temples and Shrines Preservation Law was passed, instituting the protection of structures and artifacts in Japan designated National Treasures.
1914 – Around 2,000 members of European society attended a ball at Kenwood House, England, in one of the last major social events before the outbreak of the First World War.
1881 – The Jeannette expedition to reach the North Pole from the Pacific Ocean via the Bering Strait came to an end when the USS Jeannette(pictured), after having been trapped in ice for almost two years, was crushed and sank.
1904 – Irish author James Joyce(pictured) began a relationship with Nora Barnacle, and subsequently used the date to set the actions for his 1922 novel Ulysses, commemorated as Bloomsday.
2002 – A magnitude-6.5 earthquake struck northwestern Iran, killing at least 230 people and injuring 1,300 others; the official response, perceived to be slow, later caused widespread public anger.
1374 – An outbreak of dancing mania, in which crowds of people danced themselves to exhaustion, began in Aachen (in present-day Germany) before spreading to other parts of Europe.
1950 – A Douglas DC-4 Skymaster aircraft (pictured)crashed after departing from Perth, becoming the worst peacetime aviation accident in Australia's history.
2010 – A G20 summit, the largest and most expensive security operation in Canadian history, began in downtown Toronto.
1904 – In the worst maritime disaster involving a Danish merchant ship, SS Norge ran aground on Hasselwood Rock and sank in the North Atlantic, resulting in more than 635 deaths.
1613 – The original Globe Theatre in London burned to the ground after a cannon employed for special effects misfired during a performance of Henry VIII and ignited the roof.
1967 – Actress Jayne Mansfield(pictured), her boyfriend Sam Brody, and their driver were killed in a car accident outside of New Orleans, while her children Miklós, Zoltán, and Mariska Hargitay escaped with only minor injuries.
2020 – Reddit banned r/The_Donald, a pro-Trump subreddit, for rule violations and antagonizing the company.