Aerojet serves the missile defense markets as a manufacturer of propulsion control systems. These systems power and provide directional control for critical missile defense applications. Aerojet has content in every phase of ballistic missile flight, boost, mid-course, and terminal, in support of the Missle Defense Agency Mission: To develop and field an integrated, layered, ballistic missle 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.