U.S. Marines lead an Afghan detainee toward their combat outpost for questioning in a Taliban stronghold area in Marjah, Helmand province, southern Afghanistan, April 1, 2010. The leak of more than 90,000 secret military intelligence reports on the war in Afghanistan paints a grim and often discouraging picture of the situation on the ground.
Mauricio Lima/AFP/Getty Images
The U.S. Computer Emergency Readiness Team/National Cybersecurity and Communications Integration Center is designed to help protect the technical infrastructure of the United States.
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Last month Chairman of the Joint Chiefs of Staff Michael Mullen testified in Washington on the Defense Department's fiscal 2011 budget. He said recently that debt was one of the biggest threats to the United States.
Pablo Martinez Monsivais/AP
Gen. William K. Harrison, Jr., seated at left, and North Korean Gen. Nam Il, seated at right, sign armistice documents in Armistice Hall in Panmunjom, a no man's land between the Koreas, on July 26, 1953.
Employee Sean Tippett works in an operations room at the headquarters of Cisco Systems, a leading provider of Internet network technology, in San Jose, Calif. Experts are debating the need for Internet traceability for security purposes -- and what that would mean for online anonymity and civil liberties in places such as China and Iran.
Defense Secretary Robert Gates delivers the oath of office to Gen. Keith Alexander (right) during the activation ceremony of U.S. Cyber Command at Fort Meade, Md., last month.
Cherie Cullen/AP/Department of Defense
Director of National Intelligence Dennis Blair, seen here in February, offered his resignation Thursday. During the 16 months on the job, Blair struggled to establish his authority over the CIA and other U.S. intelligence agencies.
Manuel Balce Ceneta/AP