19 May 1921

In Iran, a helicopter crash killed eight people, including President Ebrahim Raisi and Foreign Minister Hossein Amir-Abdollahian.

The wedding of Prince Harry and Meghan Markle (both pictured) took place at St George's Chapel in Windsor Castle, England.

A corroded pipeline near Refugio State Beach, California, spilled 142,800 gallons (3,400 barrels) of crude oil onto the Gaviota Coast.

In Bangkok, the Thai military concluded a week-long crackdown on widespread protests by forcing the surrender of opposition leaders.

The Sierra Gorda Biosphere, which encompasses the most ecologically diverse region in Mexico, was established as a result of grassroots efforts.

Breakup of Yugoslavia: With the local Serb population boycotting the referendum, Croatians voted in favour of independence from Yugoslavia.

Actress Marilyn Monroe performed a sultry rendition of "Happy Birthday to You" during a televised celebration for U.S. President John F. Kennedy.

First World War: Australian and New Zealand troops repelled the third attack on Anzac Cove, inflicting heavy casualties on the attacking Ottoman forces.

Captain John Franklin (pictured) departed Greenhithe, England, on an expedition to the Canadian Arctic in search of the Northwest Passage; all 129 men were later lost when their ships became icebound in Victoria Strait.

The United States Congress passed the largest tariff in the nation's history, which resulted in severe economic hardship in the American South.

A combination of thick smoke, fog, and heavy cloud cover caused darkness to fall on parts of Canada and the New England area of the United States by noon.

American Revolutionary War: A Continental Army garrison west of Montreal surrendered to British troops at the Battle of the Cedars.

French physicist Jean-Pierre Christin published the design of a mercury thermometer using the centigrade scale, with 0 representing the melting point of water and 100 its boiling point.

John III Sobieski (pictured) was elected by the szlachta as the monarch of the Polish–Lithuanian Commonwealth.

Anglo-Spanish War: English forces invaded Jamaica, then administered by Spain as the Colony of Santiago, and captured it a week later.

Gregory II began his pontificate; his conflict with Byzantine emperor Leo III eventually led to the establishment of the temporal power of the pope.

A helicopter crash in Iran leaves 8 people dead, including the country's president Ebrahim Raisi & foreign minister Hossein Amir-Abdollahian.

The wedding of Prince Harry and Meghan Markle is held at St George's Chapel, Windsor, with an estimated global audience of 1.9 billion.

EgyptAir Flight 804 crashes into the Mediterranean Sea while traveling from Paris to Cairo, killing all on board.

The Refugio oil spill deposited 142,800 U.S. gallons (3,400 barrels) of crude oil onto an area in California considered one of the most biologically diverse coastlines of the west coast.

Three gas cylinder bombs explode in front of a vocational school in the Italian city of Brindisi, killing one person and injuring five others.

The Royal Thai Armed Forces concludes its crackdown on protests by forcing the surrender of United Front for Democracy Against Dictatorship leaders.

President of Romania Traian Băsescu survives an impeachment referendum and returns to office from suspension.

Space Shuttle program: Space Shuttle Atlantis is launched on mission STS-101 to resupply the International Space Station.