September 11 attacks
The September 11 attacks (also referred to as 9/11) were a series of four coordinated terrorist attacks by the Islamic terrorist group al-Qaeda against the United States on the morning of Tuesday, September 11, 2001. The attacks killed 2,996 people, injured over 6,000 others, and caused at least $10 billion in infrastructure and property damage. Additional people died of 9/11-related cancer and respiratory diseases in the months and years following the attacks.
Peoples Temple
In all, 918 people died, including 276 children. It was the greatest single loss of American civilian life in a deliberate act until the events of September 11, 2001. This includes four that died at the Temple headquarters in Georgetown that night.