Future techlogies may allow a direct reduction of core entities or centers of gravity on an operating air base. Reducing the core entities has a direct impact on base defense. As fewer things become critical for sustained operations, defending them becomes easier. Further, there is a direct synergism in operability and defense. The same techlogies that improve operability by making it easier to complete the mission, or by reducing the cost of doing business, also reduce the number of core entities, thereby reducing defense requirements.On the air base of 1996, there are many core entities. Degrading or destroying any of the ascribed core entities could degrade mission accomplishment. For the AEROSPACE base of 2025, very few things should be core.