<blockquote>“Ten years after the September 11, 2001, terrorist attacks, the U.S. government does not have a single definition for homeland security,” the report said. “Currently, different strategic documents and mission statements offer varying missions that are derived from different homeland security definitions.”</blockquote>
via <a href="http://www.wired.com/threatlevel/2013/01/homeland-security-definition/">Government Unable to Define 'Homeland Security' | Threat Level | Wired.com</a>.