B-2 Spirit was shot down to…….

Andersen Air Force Base, Guam (February 23, 2008)
Cause: Moisture in the aircraft’s sensors resulted in incorrect readings during takeoff, which led to a stall.

Outcome: The aircraft crashed shortly after takeoff, but both crew members ejected safely.

If you are alluding to rumors or conspiracy theories regarding a B-2 being shot down (for instance, in Serbia or over hostile territories), those claims are unfounded and lack support from any credible military or intelligence sources.