Nice one......
, The World looks much more like Google Earth than the old style school globe doesn't it?
For practical purposes I reckon you are "in" when you are talking to that particular country's controllers, though does the fact that the Maastricht sectors cover a chunk of NW Europe mean Belgium no longer exists
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The only place I can think of where the Border between two countries really looks like a line on the map is the Indian-Pakistan border seen at night....hundreds and hundreds of kilometers of lights.