Future security threats to the United States will come from small but agile groups that may look increasingly to cyberattacks as a means of harming larger targets, a panel of counterterrorism experts told a Senate hearing Wednesday.

Al Qaeda remains a national security threat, although it largely has been reduced to smaller franchises, noted Michael Hayden, former director of the National Security Agency (NSA). Those franchises are gaining more and more global aspirations outside of their local regions