Legal issues related to the September 11 attacks

A number of incidents stemming from the September 11 attacks have raised questions about legality.

These include:

• Detentions of U.S. residents soon after the attacks.
• Detention and imprisonment of hundreds of people without charges and without following any previously defined standard, such as at Guantanamo Bay, Cuba.
• Extraordinary renditions.
• Certain actions to increase surveillance and to screen airline passengers.
• The U.S.-led invasion of Iraq.
• The Abu Ghraib prison scandal.
• Allegations of war crimes, including killings of noncombatants.
• Waterboarding and other allegations of torture.
• US citizens' extensive loss of civil rights under the USA Patriot Act.