In 2016 engineers at the University of California, Berkeley, create the first dust-sized wireless sensors that may be implanted within the body.
2011 – War in Afghanistan: A United States military helicopter is shot down, killing 30 American special forces members and a working dog, 7 Afghan soldiers, and 1 Afghan civilian. It was the deadliest single event for the United States in the War in Afghanistan.
1991 – Takako Doi, chair of the Social Democratic Party, becomes Japan's first female speaker of the House of Representatives.
1960 – Cuban Revolution: Cuba nationalizes American and foreign-owned property in the nation.
1956 – After going bankrupt in 1955, the American broadcaster DuMont Television Network makes its final broadcast, a boxing match from St. Nicholas Arena in New York in the Boxing from St. Nicholas Arena series.
1945 – World War II: Hiroshima, Japan is devastated when the atomic bomb "Little Boy" is dropped by the United States B-29 Enola Gay. Around 70,000 people are killed instantly, and some tens of thousands die in subsequent years from burns and radiation poisoning.
1942 – Queen Wilhelmina of the Netherlands becomes the first reigning queen to address a joint session of the United States Congress.
1926 – Gertrude Ederle becomes the first woman to swim across the English Channel.
1914 – World War I: First Battle of the Atlantic: Two days after the United Kingdom had declared war on Germany over the German invasion of Belgium, ten German U-boats leave their base in Heligoland to attack Royal Navy warships in the North Sea.
1890 – At Auburn Prison in New York, murderer William Kemmler becomes the first person to be executed by electric chair.
1862 – American Civil War: The Confederate ironclad CSS Arkansas is scuttled on the Mississippi River after suffering catastrophic engine failure near Baton Rouge, Louisiana.
1819 – Norwich University is founded in Vermont as the first private military school in the United States.
1787 – Sixty proof sheets of the Constitution of the United States are delivered to the Constitutional Convention in Philadelphia, Pennsylvania.
1777 – American Revolutionary War: The bloody Battle of Oriskany prevents American relief of the Siege of Fort Stanwix.
1538 – Bogotá, Colombia, is founded by Gonzalo Jiménez de Quesada.