The system was created by Homeland Security Presidential Directive 3 on March 11 , 2002 , in response to the September 11 attacks . It was meant to provide a " comprehensive and effective means to disseminate information regarding the risk of terrorist acts to federal , state , and local authorities and to the American people . " It was unveiled March 12 , 2002 , by Tom Ridge , then the Assistant to the President for Homeland Security . However , responsibility for developing , implementing and managing the system was given to the U.S. Attorney General
September 11 attacks
September 11 attacks
Homeland Security Advisory System