The Mountain Meadows Massacre
On September 11, 1857, around 120 emigrants were killed at Mountain Meadows in Utah by Mormon militia and Paiute allies.
The Babi Yar Massacre Begins Near Kiev
On September 29, 1941, German forces began the Babi Yar massacre outside Kiev, killing some 33,771 Jews in two days.
The Tlatelolco Massacre in Mexico City
On October 2, 1968, soldiers fired on students at Tlatelolco in Mexico City, days before the Olympics.
Palestinian Gunmen Attack the Israeli Olympic Team in Munich
On September 5, 1972, Black September gunmen took Israeli athletes hostage at the Munich Olympics, ending in the deaths of all nine hostages.
The September 11 Attacks on the United States
On September 11, 2001, hijackers flew four planes into the World Trade Center and the Pentagon, killing nearly 3,000 people.
The Moscow Theatre Hostage Crisis
On October 23, 2002, armed hostage takers seized a Moscow theatre with about 850 people inside, demanding a Russian withdrawal from Chechnya.