<;p>;<;b>;<;a href=";https://www.onthisday.com/events/date/1545";>;1545<;/a>;<;/b>; - French King Francis I orders the Waldensian Protestants of the village of Mrindol to be punished‚ setting off a massacre<;br>;<;b>;<;a href=";https://www.onthisday.com/events/date/1892";>;1892<;/a>;<;/b>; - George C Blickensderfer patents portable typewriter<;br>;<;b>;<;a href=";https://www.onthisday.com/events/date/1916";>;1916<;/a>;<;/b>; - Irish nationalist activist and poet Roger Casement boards submarine U-19 at Wilmshaven‚ Germany‚ bound for a rendezvous with the Aud at Tralee<;br>;<;b>;<;a href=";https://www.onthisday.com/events/date/1924";>;1924<;/a>;<;/b>; - WLS-AM in Chicago begins radio transmissions<;br>;<;b>;<;a href=";https://www.onthisday.com/events/date/1930";>;1930<;/a>;<;/b>; - Wilfred Rhodes ends Test Cricket career aged 52 years 165 days<;br>;<;b>;<;a href=";https://www.onthisday.com/events/date/1955";>;1955<;/a>;<;/b>; - Polio vaccine tested by Jonas Salk announced to be ';safe and effective'; and is given full approval by the US Food and Drug Administration<;br>;<;b>;<;a href=";https://www.onthisday.com/events/date/1979";>;1979<;/a>;<;/b>; - Soyuz 33 returns to Earth<;br>;<;b>;<;a href=";https://www.onthisday.com/events/date/1998";>;1998<;/a>;<;/b>; - 62nd US Masters Tournament‚ Augusta National GC: Mark O';Meara claims his first major title with a 20-foot birdie putt on the final hole to win by 1 stroke from David Duval and Fred Couples<;br>;<;b>;<;a href=";https://www.onthisday.com/events/date/2020";>;2020<;/a>;<;/b>; - Huge storm system produces more than 40 tornadoes in the US from Texas to South Carolina killing 32 people across six states<;br>;<;b>;<;a href=";https://www.onthisday.com/events/date/2023";>;2023<;/a>;<;/b>; - US Environmental Protection Agency proposes landmark set of pollution regulations to drive down greenhouse-gas emissions‚ including electric vehicles making up 67% of new passenger-car sales by 2032<;/p>;<;p>;<;a href=";https://www.onthisday.com/today/events.php";>;More Historical Events <;/a>;<;/p>;