The Department of Defense (DoD) is a department of the federal government and has three main components: The departments of the Army, Navy, and Air Force. The DoD is housed in the Pentagon building. The department's roles and limits are contained in Title 10 of the US Code. This section of the law has five components: Subtitle A refers to General Military Law, Subtitle B to the Army, Subtitle C to the Navy and the Marine Corps, Subtitle D to the Air Force and Subtitle E to Military Reserves. Important agencies within the DoD include the Defense Information Systems Agency (DISA), National Security Agency (NSA), the Missile Defense Agency, and the Defense Intelligence Agency (DIA). The DoD receives the largest portion of each year's federal discretionary spending budget. 

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US, Japan partner on cyber defense

The Defense Department and Japanese Ministry of Defense share several viewpoints about cybersecurity, and that common ground has led the two to promise aid to each other in the event of an attack, according to a joint statement.

GAO: DoD has avoided cost and schedule overruns for programs in the testing phase

The Government Accountability Office lauded the Defense Department in a report Tuesday for its ability to avoid disputes that cause schedule and cost overruns for programs in the testing and evaluation phase.

DoD needs to beef up insider-threat protection, GAO says

The Defense Department's efforts to curb insider threats don't go far enough, a new report found.

DoD updates guidance on IT services management

The Defense Department's chief information officer signed new guidance for the management of information technology services.

Mobile analytics can be a game changer for federal apps, says DoD mobility specialist

For those agencies using mobile apps, analytics can be an invaluable tool, said David Cooper, mobile applications program lead at the DoD's National Center for Telehealth and Technology.

Cyber stands to make gains in national defense bill, but Obama threatens veto

To help bolster U.S. cyber defense, the bill calls for authorizing the president to use military cyber action in response to an attack on the nation, additional funding to the Defense Innovation Initiative for increased investment in various technologies, and more cyber procurement funding.

IG: DoD footed the bill for nearly $1M of employees' personal casino and strip club purchases

Defense Department employees and military members used their government-issued charge cards to spend more than $1 million in personal expenses at casinos and strip clubs, says a May 19 DoD inspector general report.

Report: Federal R&D funding was slashed in fiscal 2013

Federal funding for research and development fell dramatically in fiscal 2013 compared to the previous fiscal year, which includes about $10 billion in cuts to the Defense Department, says the National Center for Science and Engineering Statistics.

Army, Air Force face challenges in completing training requirements for drone pilots, GAO says

The Defense Department has acquired more than 10,000 drones and training pilots is an integral part of its plans. However, the Army and Air Force in recent years have faced several challenges in getting that pilot training completed.

New report argues for narrowing role of nuclear weapons in US policies, diplomacy and forces

The report recognizes that nuclear weapons are "indispensable" to deter other nations from attacking the U.S. and allies with such weapons, but offer no other advantage over U.S. conventional military superiority.