MORE EVENTS ON THIS DAY

2016: Brazilian President Dilma Rousseff was impeached and removed from office after the country 's Senate found her guilty of having used state bank funds to cover up a budget deficit in the run-up to her reelection in 2014. [ Test your knowledge of Latin American history.]

1992: An 11-day standoff in Ruby Ridge , Idaho, between government officials and an armed family headed by self-proclaimed white separatist Randy Weaver ended with his surrender; three people—Weaver's wife, Vicki, his 14-year-old son, Sammy, and U.S. Marshal William Degan—had been killed during the siege.

1991: Uzbekistan and Kyrgyzstan declared independence from the Soviet Union. [ Take our history buff quiz.]

1980: Polish labour activist Lech Wałęsa and Mieczysław Jagielski, Poland's first deputy premier, signed an agreement that conceded to workers the right to organize freely and independently.

1966: The Harrier “jump-jet” fighter-bomber made its first flight. [Test your knowledge of aircraft and aviation.]

1888: The mutilated body of Mary Ann Nichols was discovered in the Whitechapel district of London's East End, and many believe she was the first victim of Jack the Ripper. [ Read about seven of history's most notorious serial killers, including Jack the Ripper.]