WASHINGTON, DC - MARCH 12:  U.S. Army Gen. Keith Alexander, Director of the National Security Agency , and commander of the U.S. Cyber Command, prepares to testify before a House Armed Services Committee on Capitol Hill, March 12, 2014 in Washington, DC.The committee is hearing testimony on information technology, cyber operations, and modernization and policy issues in a changing national security environment.  (Photo by Mark Wilson/Getty Images)