This craft was moving East to West at the southwest corner of Wright-Patterson Air Force Base, there was no report.One very large disk, 2 football fields long looked like 2 dishes one upside down placed one on the other, these were separated by a deep vertical side wall.
The entire craft was slate gray in color, this area had moving lights traveling around the side wall much like neon lights that were in a sine wave pattern.
I saw no openings or protrusions of any kind.
The craft was moving slowly and made no sound,I also did not feel a rush of air as it moved, when it left our sight it was as a light bulb being turned off.