U.S. Army Master Sgt. Aboubacar Ballo, with Detachment 3 of the U.S. Army Reserve Element, Defense Information Systems Agency, reviews the assigned exercise material during day one of the Cyber X-Games, hosted by the Army Reserve Cyber Operations Group (ARCOG), 335th Signal Command (Theater), June 15 at Carnegie Mellon University. Cyber X Games is a five-day exercise focusing on advanced areas of cyber security training. Cyber X-Games is also part of Cyber Endeavour, the Department of Defense-sponsored conference for military and civilian practitioners from across government, industry and academia to address the nexus of cyberspace and national security. (U.S. Army Reserve photo by Sgt. Erick Yates)