Army Gen. Keith Alexander, who is stepping down as head of U.S. Cyber Command and the National Security Agency, delivers remarks at his retirement ceremony at the National Security Agency headquarters on Fort George Meade, Md., March 28, 2014. Army Gen. Keith Alexander, who is stepping down as head of U.S. Cyber Command and the National Security Agency, delivers remarks at his retirement ceremony at the National Security Agency headquarters on Fort George Meade, Md., March 28, 2014. SHARE: Download: Full Size (7.46 MB) Tags: Photo Essays Credit: VIRIN: 217420-C-UAE10-497.jpg Photo Gallery