Quote Originally Posted by Brett Patron View Post
Lets bear in mind...although there is an "air domain" both the maritime and land domains do claim a portion of the air above them for their operations as well. Further, there is almost always "inter-domain" operations, especially once you are considering actions beyond the most tactical level. So the example above does not really track with the question at hand.

(On a humorous side note: an AF Space officer, when asked where the air domain ends and space domain begins, replied, "when your air-breathing engine stops working, you're in space".
It strikes me that maritime, air, and space domains all have a location attribute—they can be identified using a Cartesian coordinate system. One useful question might be, “Is cyberspace not a domain because it lacks a location attribute or is cyberspace unique as a domain in its lack of location attribute?”*

*The infrastructure necessary for the existence of cyberspace can of course be put on a grid but the space in cyberspace is just a metaphor, and a not very felicitous metaphor as far as I am concerned.