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.
Don Harris (journalist)
Later that same day, 909 inhabitants of Jonestown, 276 of them children, died of apparent cyanide poisoning, mostly in and around a pavilion. This resulted in the greatest single loss of American civilian life in a non-natural disaster until the September 11, 2001 attacks.