1861 – The first national flag of the Confederate States of America (the “Stars and Bars”) is adopted.
1890 – The longest bridge in Great Britain, the Forth Bridge in Scotland, measuring 1,710 feet (520 m) long, is opened by the Prince of Wales, later King Edward VII.
1957 – The S&P 500 stock market index is introduced, replacing the S&P 90.
1986 – The Soviet Vega 1 begins returning images of Halley’s Comet and the first images of its nucleus.
2018 – Former MI6 spy Sergei Skripal and his daughter are poisoned with a Novichok nerve agent in Salisbury, England, causing a diplomatic uproar that results in mass-expulsions of diplomats from all countries involved.
Births
1394 – Henry the Navigator, Portuguese explorer (d. 1460)
1678 – Antonio Vivaldi, Italian violinist and composer (d. 1741)
1745 – Casimir Pulaski, Polish-American general (d. 1779)
1856 – Alfred William Rich, English painter, author, and educator (d. 1921)
1906 – Avery Fisher, American violinist and engineer, founded Fisher Electronics (d. 1994)
1932 – Ed Roth, American illustrator (d. 2001)
1936 – Jim Clark, Scottish race car driver (d. 1968)
1986 – Mike Krieger, computer programmer and businessman, co-founded Instagram
Deaths
1172 – Stephen III, king of Hungary (b. 1147)
1853 – Christian Leopold von Buch, German geologist and paleontologist (b. 1774)
1963 – William Carlos Williams, American poet, short story writer, and essayist (b. 1883)
1974 – Adolph Gottlieb, American painter and sculptor (b. 1903)
2007 – Thomas Eagleton, American lawyer and politician, 38th Lieutenant Governor of Missouri (b. 1929)
2019 – Luke Perry, American actor (b. 1966)
Credit: Wikipedia and other internet and non-internet sources