Ummm... that is because there ARE no B-2s at DM.
There were exactly 21 B-2s built* - including the 6 test & development airframes which were converted to late-production standard at the end of the production run.
1 was destroyed in a crash (23 February 2008, B-2 Spirit of Kansas, 89-0127), 1 is at the 412th Test Wing at Edward Air Force Base, California, and the other 19 are all at the 509th Bomb Wing at Whiteman Air Force Base, Missouri.
* Plus two test articles, built without engines or instruments for static testing.