What is the goal of the Missile Defense Agency?

The main goal for the Missile Defense Agency is to protect by creating a layered missile defense system. This will be able to defend all ballistic missiles during different stages of flight. As well as this they also have 9 other goals in order to promote this defense method. This includes showing that this is a successful method of defense by means testing with positive outcomes, developing management resources as well as positively using tax payers money in order to fund the testing of the defense missile.