2016: Former The Voice contestant Christina Grimmie is fatally shot in Orlando, Florida following a concert; she died from her injuries at the age of 22.
2002: The first direct electronic communication experiment between the nervous systems of two humans is carried out by Kevin Warwick in the United Kingdom.
1997: Before fleeing his northern stronghold, Khmer Rouge leader Pol Pot orders the killing of his defense chief Son Sen and 11 of Sen's family members.
1990: British Airways Flight 5390 lands safely at Southampton Airport after a blowout in the cockpit causes the captain to be partially sucked from the cockpit. There are no fatalities
1944: In baseball, 15-year-old Joe Nuxhall of the Cincinnati Reds becomes the youngest player ever in a major-league game.
1944: World War II: In Distomo, Boeotia, Greece, 218 men, women and children are massacred by German troops.
1944: World War II: Six hundred forty-two men, women and children massacred at Oradour-sur-Glane, France.
1942: World War II: Nazis burn the Czech village of Lidice in reprisal for the killing of Reinhard Heydrich.
1940: World War II: Norway surrenders to German forces.
1940: World War II: U.S. President Franklin D. Roosevelt denounces Italy's actions in his "Stab in the Back" speech at the graduation ceremonies of the University of Virginia.
1940: World War II: Italy declares war on France and the United Kingdom.
1918: The Austro-Hungarian battleship SMS Szent István sinks off the Croatian coast after being torpedoed by an Italian MAS motorboat; the event is recorded by camera from a nearby vessel.
1886: Mount Tarawera in New Zealand erupts, killing 153 people and burying the famous Pink and White Terraces. Eruptions continue for three months creating a large, 17 km long fissure across the mountain peak.
1539: Council of Trent: Pope Paul III sends out letters to his bishops, delaying the Council due to war and the difficulty bishops had traveling to Venice.
1190: Third Crusade: Frederick I Barbarossa drowns in the river Saleph while leading an army to Jerusalem.
671: Emperor Tenji of Japan introduces a water clock (clepsydra) called Rokoku. The instrument, which measures time and indicates hours, is placed in the capital of Ōtsu.