HAGEL COMMENTS Defense Secretary Chuck Hagel delivers remarks at the retirement ceremony of Army Gen. Keith Alexander, who is stepping down as head of U.S. Cyber Command and the National Security Agency, at the agency's headquarters on Fort George Meade, Md., March 28, 2014. SHARE: Download: Full Size (0.03 MB) Credit: VIRIN: 173774-D-KMR21-038.jpg Photo Gallery