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.
Post–September 11 anti-war movement
On September 11, 2001 a series of coordinated terrorist attacks against the United States killed approximately 3000 people. These attacks appear to have been carried out by a small group of individuals who formed part of the al-Qaida network: Islamists without formal backing from any state (though there were and are suspicions that Al-Qaida was aided and funded by several Arab/Muslim countries). Following them U.S. president George W. Bush declared a campaign with the stated aim of defeating terrorism which he called the "War on Terrorism".