CYBER SESSION Army Gen. Martin E. Dempsey, chairman of the Joint Chiefs of Staff, takes questions from the audience during a discussion on the military's role in cyberspace and the threat that cyberattacks pose at the Brookings Institution in Washington, D.C., June 27, 2013. SHARE: Download: Full Size (0.06 MB) Credit: VIRIN: 169866-M-RKG14-782.jpg Photo Gallery