1784 – Elisabeth Thible becomes the first woman to fly an untethered hot air balloon.
1812 – The Louisiana Territory was renamed the Missouri Territory to avoid confusion with the recently admitted state of Louisiana.
1896 – Henry Ford test-drives his “Quadricycle”, the first automobile he designed or drove.
1912 – Massachusetts becomes the first state to set a minimum wage.
1919 – Congress passes the 19th Amendment, guaranteeing women the right to vote and sends it to the states for ratification.
1942 – Battle of Midway begins, one of the most decisive U.S. victories against Japan in WWII.
1989 – The Tiananmen Square massacre takes place in Beijing, China. Chinese troops kill and arrest thousands of pro-democracy protestors.