Cooperative Engagement Capability (CEC) is the true “secret weapon” of AEGIS fleet defense. On the one hand, this JHU/APL brainchild consists only of a data distribution system, including antenna, and the cooperative engagement processor. Yet those simple components add up to something incredibly powerful, by bringing radar, sensor and tracking data from a number of widely separated platforms together in one big picture. The resulting sensor fusion significantly improves weapons tracking consistency and continuity; expands detection ranges, thus increasing reaction time; and enables entirely new engagement strategies against threats. Indeed, CEC has applications that reach beyond the sea to ground-based systems, blimps, and even successful ballistic missile defense.