The B2's won't be in use, they never are. There are tens of thousands of operatives just waiting to mark the targets, they will be taken out by very high altitude UAV's and very fast overpasses by F22's, after that they can't target jack shit and really, REALLY big bombers will swoop in and take out every military facility left.
The B2 is a useless POS in every scenario I can possibly imagine. Not only is it unreliable, the stealth isn't needed either so it has become a compromise that isn't even needed.
It might be used though, to justify it's existence, that's the case with the overwhelming majority of the US military hardware.