In general I think the terms Army,Navy,Air Force are obsolete. I think it was CavGuy that said it best or rather our Constitution said it. We need a National guard with air,land,coastal and space branches deigned to work together. And we need an International guard again with an air,land,sea,space branches designed to work together. Systems designed to accomplish a purpose not organizations dedicated to operate in one of the specific elements of our earth. For human life to exist we need air, land and sea and that is how nature works. Wouldn't we be better off if this was our model?? Nature is pretty smart and so were the guys that wrote the Constitution.