MDA Mission
To develop and field an integrated, layered, ballistic missile defense system to defend the United States, its deployed forces, allies, and friends against all ranges of enemy ballistic missiles in all phases of flight.
  1. Retain, recruit, and develop a high-performing and accountable workforce.
  2. Deliver near-term additional defensive capability in a structured Block approach to close gaps and improve the BMDS.
  3. Establish partnerships with the Services to enable their operations and support of the BMDS components for the Combatant Commanders.
  4. Substantially improve and demonstrate the military utility of the BMDS through increased system integration and testing.
  5. Execute a robust BMDS technology and development program to address the challenges of the evolving threat through the use of key knowledge points.
  6. Expand international cooperation through a comprehensive strategy to support our mutual security interests in missile defense.
  7. Maximize mission assurance and cost effectiveness of MDA's management and operations through continuous process improvement.
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It is the policy of the United States to deploy as soon as is technologically possible an effective National Missile Defense system capable of defending the territory of the United States against limited ballistic missile attack (whether accidental, unauthorized, or deliberate) with funding subject to the annual authorization of appropriations and the annual appropriation of funds for National Missile Defense.

— National Missile Defense
Act of 1999 (Public Law 106-38)