I see no advantage in having a crew.
There is nothing they can do that couldn't be done remotely, and the environmental/life-support systems would only add weight and take up valuable space.
I have a hunch that this might form part of our missile defense program; the US has talked before about actually shooting down ballistic missiles in space.
> I see no advantage in having a crew.
Decison-making, especially important with a recallable, nuke-armed vehicle. With an ICBM, you're comitted the moment you hit the "launch" button. With a manned bomber, you're comitted the moment the weapon leaves the bomber.