If I remember correctly, when they rolled out the B-2, somebody forgot to issue a No Fly Zone restriction.
Because of that there is a Photo of the B-2 from above that shows the “Top Secret” Shape of the Fuselage from above.
I think it was taken by a Photographer who worked for an Aviation Magazine.
Top Secret is in the eye of the beholder.
Heck, NG had a cardboard cutout of it in their lobby. No secret there.