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The Department of Defense is expected in coming weeks to grant two separate, security approvals for Samsung's Galaxy smartphones, along with iPhones and iPads running Apple's latest operating system.

A new Pentagon report says North Korea probably has nuclear weapons that can be launched by ballistic missile, although it says the weapons are not very reliable....

The Pentagon said Wednesday that it was sending a mobile missile defense system to Guam as a "precautionary move," as Defense Secretary Chuck Hagel said North Korea posed a "real and clear danger" to the U.S. military base on the western Pacific island, as well as to allies and other U.S. territory.

The Pentagon on Tuesday condemned North Korea's threats to target U.S. military bases, saying the United States was ready to respond to "any contingency."

U.S. Defense Secretary Chuck Hagel is expected to announce Friday afternoon that the Pentagon will enhance the nation's ability to defend itself from a nuclear attack by North Korea, a U.S. defense official told CNN.

The House has approved legislation to prevent a government shutdown at the end of the month and give the Pentagon some relief from a cash crunch that's harming military readiness.

A new report for the Pentagon has concluded that the nation’s military is unprepared for a full-scale cyber-conflict with a top-tier adversary and must ramp up its offensive prowess. The unclassified version of the study by the Defense Science Board also urges the intelligence community to boost its collection on leading nations’ cyber-capabilities.

The Pentagon unveiled a plan on Tuesday to ultimately enable the Defense Department's 600,000 users of smartphones, computer tablets and other mobile devices to rapidly share classified and protected data using the latest commercial technologies.

The F-35 is the Pentagon's most expensive weapons program at a total estimated cost of nearly $400 billion. The problem was discovered during what the Pentagon called a routine inspection at Edwards Air Force Base, Calif., of an Air Force version of the F-35. Other versions of the F-35 are flown by the Navy and the Marine Corps. All versions were grounded Friday.

Republicans have, for now, blocked Chuck Hagel's nomination to become defense secretary.