Not sure. The B-17 belongs to the EAA (Experimental Aircraft Association) and there was an EAA support van parked nearby with posters advertising rides, but I didn't see or hear anything from the local news outlets about this. The plane is supposedly due back Jun 1st for an airshow.

If you look closely at the tail gun position you can see a mannequin decked out as a tail gunner. Now isn't that a coincidence.