World War I: The civilian authorities of Antwerp surrendered and allowed the German army to capture the city.
The Holocaust: Sonderkommando work-unit members in Auschwitz concentration camp revolted upon learning that they were due to be killed; although a few managed to escape, most were massacred on the same day.
In the first proven act of sabotage in the history of commercial aviation, a Boeing 247 operated by United Airlines exploded in mid-air near Chesterton, Indiana, killing all seven people aboard.
The Partial Nuclear Test Ban Treaty, which prohibits all test detonations of nuclear weapons except for those conducted underground, went into effect.
English astronomer William Lassell discovered Triton, the largest moon of Neptune.
After 20 years of construction, Vidyasagar Setu (pictured), the longest cable-stayed bridge in India, opened, joining Kolkata and Howrah.
