21 October 1991

North Korea and the United States signed the Agreed Framework to limit the former's nuclear weapons program and to normalize relations between the two countries.

In Seoul, South Korea, 32 people were killed and 17 others injured when a span of the Seongsu Bridge collapsed (pictured).

At the height of the Japanese university protests, protesters occupied Shinjuku Station in Tokyo and clashed violently with police.

A coal tip fell on the village of Aberfan, Wales, killing 144 people, mostly schoolchildren.

The Solomon R. Guggenheim Museum, designed by American architect Frank Lloyd Wright, opened in New York City.

World War II: The three-week-long Battle of Aachen concluded, making the city the first on German soil to be captured by the Allies.

World War II: German soldiers massacred nearly 2,800 Serbs in Kragujevac in reprisal for insurgent attacks in the district of Gornji Milanovac.

HMS Niobe arrived in Halifax Harbour to become the first large ship of the Royal Canadian Navy.

The first and second of three treaties were signed near Medicine Lodge, Kansas, between the United States federal government and several Native American tribes in the Great Plains, requiring them to relocate to areas in present-day western Oklahoma.

French composer Jacques Offenbach's operetta Orpheus in the Underworld, featuring the music most associated with the can-can (audio featured), was first performed at the Théâtre des Bouffes-Parisiens in Paris.

Florence Nightingale and a staff of 38 nurses and 15 nuns were sent to the Ottoman Empire to help treat wounded British soldiers fighting in the Crimean War.

Hundred Years' War: The English victory at the Battle of Auberoche marked a change in the military balance of power in Aquitaine, with the subsequent collapse of the French position.

First Crusade: At the Battle of Civetot, the Seljuk forces of Kilij Arslan destroyed the army of the People's Crusade as it marched toward Nicaea.

Thirty people are killed in a fiery bus crash in western Democratic Republic of the Congo.

In Canada, the 2019 Canadian federal election ends, resulting in incumbent Prime Minister Justin Trudeau remaining in office, albeit with the Liberal Party in a minority government.

A passenger train derails in Yilan County, Taiwan, killing 18 people and injuring 187.

Iraq War: President Barack Obama announces that the withdrawal of United States troops from Iraq will be complete by the end of the year.

Finnish race drivers Kimi Räikkönen of Scuderia Ferrari won the Brazilian Grand Prix in Formula One. With this result, Räikkönen became world champion, surpassing McLaren drivers Lewis Hamilton and Fernando Alonso by one point in the drivers' standings.

Images of the dwarf planet Eris are taken and subsequently used in documenting its discovery.

North Korea and the United States sign an Agreed Framework that requires North Korea to stop its nuclear weapons program and agree to inspections.

In Seoul, South Korea, 32 people are killed when a span of the Seongsu Bridge collapses.

In Honduras, 131 people are killed when a Boeing 727 crashes on approach to Toncontín International Airport near the nation's capital Tegucigalpa.

The Jaffna hospital massacre is carried out by Indian peacekeeping forces in Sri Lanka, killing 70 Tamil patients, doctors and nurses.

In Lebanon, pro-Iran kidnappers claim to have abducted American writer Edward Tracy (he is released in August 1991).