On This Day for 4/20 - An explosion occurs on the Deepwater Horizon oil rig, Adolf Hitler is born, and more

Don't miss an issue of On This Day! Simply add [customerservice@eb.com]( to your address book. On This Day April 20 Discover the Fastest Route to Britannica - [EB.com]( Born This Day [Adolf Hitler reviewing troops on the Eastern Front, 1939.]( [Adolf Hitler]( Born this day in 1889 in Austria, [Adolf Hitler]( became leader of the [Nazi Party]( in 1920 and chancellor of Germany in 1933, created a formidable war machine, provoked [World War II]( and orchestrated the [Holocaust](. Who else was born today? Find out with the newest version of [our best-selling software! >>]( On This Day [Deepwater Horizon oil rig explosion]( 2010: Explosion on the Deepwater Horizon oil rig On this day in 2010, an explosion occurred on the [Deepwater Horizon]( oil rig—located in the Gulf of Mexico, some 41 miles (66 km) off the coast of Louisiana—leading to the largest oil spill in history. Explore more key moments in history for just $39.95 [Learn more >>]( [Sign up now]( for our monthly newsletter, showcasing articles hand-picked by our editors! More Events On This Day 2008: American race car driver [Danica Patrick]( won the IndyCar 300, becoming the first woman to win an IndyCar championship event. 1999: [Grieving students from Columbine High School…]( disgruntled and heavily armed students entered [Columbine High School]( in [Littleton]( Colorado, and murdered 13 people before killing themselves. 1968: [Pierre Elliott Trudeau]( of the [Liberal Party]( became prime minister of [Canada]( in that post, he discouraged the French separatist movement, oversaw the formation of a new constitution, and established relations with China. 1949: American actress [Jessica Lange]( who was known for her versatility and intelligent performances, was born. 1924: [Turkey]( the dissolution of the [Ottoman Empire]( [Turkey]( Grand National Assembly voted to adopt a full republican constitution, with General [Mustafa Kemal]( who had first proclaimed the Turkish republic about six months earlier, becoming the first president of the republic. 1920: [John Paul Stevens](. Supreme Court Justice [John Paul Stevens]( was born in Chicago. 1919: [typical Red Army flag of WWII]( an [ongoing dispute]( over the possession of Vilnius, Polish forces drove out Russia's [Red Army]( had previously ousted the newly established Lithuanian government—and occupied the city. 1871: [Japan]( first government-operated [postal service]( opened between Tokyo and Ōsaka. 1840: [Odilon Redon, self-portrait]( Symbolist painter [Odilon Redon]( was born in Bordeaux. 1808: [Napoleon III]( III]( president of the [Second Republic]( (1850–52) and emperor of France (1852–70), was born in Paris. 1653: [Oliver Cromwell]( [Rump Parliament]( was dissolved by [Oliver Cromwell]( and later replaced by the nominated [Barebones Parliament]( which was dissolved in the same year, leading to the declaration of the [Protectorate](. A Great Gift Idea from The Britannica Store [1768 Encyclopaedia Britannica Replica Set]( The handsome three-volume reproduction is so beautifully executed that it's almost indistinguishable from the 1768 original, right down to the natural age spots and watermarks on the pages. A must-have for collectors of history or vintage books, the set lends an unmistakable air of prestige to any home or office. [Get yours today]( Our Best-Selling Software! the world's most trusted and authoritative information for [only $39.95](. Britannica on Facebook a fan]( on Facebook and get updated Britannica content in your news feed! Britannica on Twitter @Britannica]( and enjoy daily tweets relating to the news stories of the day! [Home]( [Advocacy for Animals]( [Newsletters]( [Feedback]( [Help]( Please note that if you do not open or click on any On This Day email during any consecutive 30-day period, we reserve the right to remove your address from the active mailing list. This policy does not apply to RSS feeds. Share: Was this message forwarded to you? [Click here]( and we'll start sending you the On This Day newsletters. This message has been sent to {EMAIL}. To unsubscribe [click here](. To unsubscribe by postal mail, send your request to: Encyclopaedia Britannica 325 N. LaSalle St. - Suite 200 Chicago, IL 60654 US ATTN: Customer Service - On This Day © 2018 Encyclopaedia Britannica, Inc. [Privacy Policy]( — [Help](