[Wdll]

Well the AAA are not used so much to kill as to force enemy planes to avoid or approach certain corridors where they will be an easier kill for more modern and accurate air defences.

The thing about the B-2 is that as far as I know it hasn't been used in anger against any reliable enemy forces with modern and well trained air defence force. In fact if you look at all post WW2 conflicts of a world power vs someone else, there is always a huge technological difference and training between the two sides. When the differences were not that huge, say Falklands, there were major problems for the major power, or when suddently one side achieved some breakthrough in weaponry, like the afghans with the Stingers. The soviet helis were dropping like flies and some planes too.