Answer:
The killing of Osama bin Laden and The Introduction of the USA Patriot Act, are the correct answers.
Explanation:
September 11 attacks was four terrorist attack by al-qaeda against US on Sept 11 ,2001. This attack killed more than 2500 people and injured more than 6000. The suspicion of attack fell on AL-Qaeda and US launched war on terror and invaded Afghanistan as it failed to comply with the US demands. It also led to the passage of Patriot to intercept and obstruct terrorism. This act gave power to law enforcement agencies of USA to search and surveillance
