U.S. Department of State Coordinator for Cyber Issues Christopher Painter testifies on "Cyber Attacks: An Unprecedented Threat to U.S. National Security" before the House Foreign Affairs Committee in Washington, D.C. on March 21, 2013. [Go to http://docs.house.gov/meetings/FA/FA14/20130321/100547/HHRG-113-FA14-Wstate-PainterC-20130321.pdf for a text transcript.]