2001 - The War on Terror
Many people still remember where they were when news of President Kennedy's assassination reached them. The same is true of the September 11th attacks. In a few short months after President Bush declared a war on terror, the Department of Homeland Security was created to coordinate federal response and protection, the USA PATRIOT Act was passed to deter terrorist attacks and strengthen law enforcement investigation tools, and President Bush signed an executive order allowing military tribunals against any foreigners suspected of connections to US terrorist attacks.
The National Commission on Terrorist Attacks Upon the United States (the 9/11 Commission) was created in 2002 and charged with the duty to "prepare a full and complete account of the circumstances surrounding the September 11, 2001 terrorist attacks, including preparedness for and the immediate response to the attacks. The Commission is also mandated to provide recommendations designed to guard against future attacks." Their report was released two years later.