I was at an airshow a few years back and a B-2 did a flyover. It was pretty impressive.
It's interesting where the idea for these comes from. At the end of WW2, the Germans had built 2 operational flying wings, one of which crashed during testing. The Americans got ahold of one of the only remaining plains after the war ended, and it was incomplete. They brought it back to the U.S. and built several different configurations of flying wings, all to limited success. The B-2 is what evolved from all of that.