sentences:  In an age where there is zero tolerance for even a single "friendly fire" death, attack aircraft from either the Navy, Marine Corps or the Air Force use the same sensors to prevent fratricide that were used in World War I—their eyeballs.Late in the last decade of the Twentieth Century, defense planners began to think beyond simply "linking" forces to "networking" them and fundamentally changing the information model at the tactical edge from one that required a priori knowledge of required information to employ forces, or "push" model, to one in which the information required was globally available and could be "pulled" as required by warfighters engaged in combat.This new model came to be known as "Network Centric Warfare (NCW)."