2020 – United States President Donald Trump is acquitted by the United States Senate in his first impeachment trial.

1958 – A hydrogen bomb known as the Tybee Bomb is lost by the US Air Force off the coast of Savannah, Georgia, never to be recovered.

1907 – Belgian chemist Leo Baekeland announces the creation of Bakelite, the world's first synthetic plastic.

2004 – Facebook, a mainstream online social networking site, is founded by Mark Zuckerberg and Eduardo Saverin.

1971 – New York Police Officer Frank Serpico is shot during a drug bust in Brooklyn and survives to later testify against police corruption.

1961 – The United States Air Force begins Operation Looking Glass, and over the next 30 years, a "Doomsday Plane" is always in the air, with the capability of taking direct control of the United States' bombers and missiles in the event of the destruction of the SAC's command post.

1933 – Adolf Hitler announces that the expansion of Lebensraum into Eastern Europe, and its ruthless Germanisation, are the ultimate geopolitical objectives of Nazi foreign policy.

1942 – The Osvald Group is responsible for the first, active event of anti-Nazi resistance in Norway, to protest the inauguration of Vidkun Quisling.

1922 – Ulysses by James Joyce is published.

1964 – The Beatles have their first number one hit in the United States with "I Want to Hold Your Hand".

1896 – La bohème premieres in Turin at the Teatro Regio (Turin), conducted by the young Arturo Toscanini.

 Red_Dragon wrote:

had to look that one up.
"Social Panic"

1865 – American Civil War: The United States Congress passes the Thirteenth Amendment to the United States Constitution, abolishing slavery, and submits it to the states for ratification.

2020 – The World Health Organization declares the COVID-19 pandemic to be a Public Health Emergency of International Concern.

1969 – The Beatles' last public performance, on the roof of Apple Records in London. The impromptu concert is broken up by the police.

1956 – In the United States, Civil Rights Movement leader Martin Luther King Jr.'s home is bombed in retaliation for the Montgomery bus boycott.

1939 – During a speech in the Reichstag, Adolf Hitler makes a prediction about the end of the Jewish race in Europe if another world war were to occur.

1933 – Adolf Hitler takes office as the Chancellor of Germany.

1996 – President Jacques Chirac announces a "definitive end" to French nuclear weapons testing.