Whilst we can assume the B-21 model has flown in a CFD ( Computational Fluid Dynamics ) environment, the question begs what if any have been flown in the real word aka scale man carrying and we all know where that could have been done. My point being w/ NG owning Scaled Composites and their personnel at NG and SC being top shelf, I have no problem with the possibility of the B-21 passing the critical review and the real prototype once flown, meeting it's design numbers and possibly even exceeding it. Build 200 or more of them, let us not do what we did with the B-2 and F-22, and oh yes moth ball the tooling after your done, and don't pull a Dick Cheney destroy all of it.