Disk shaped craft hovering above house in Stead, Nevada

My mother and I were walking down the street in Stead,a community about eight miles north of Reno Nevada,when we heard a group of kids hollering "Ufo". We thought at first it was some sort of game but hovering right on top of a house was a disk shaped object.It was about eight feet long and five feet high.It made no sound at all but you had the feeling it was aware of you.This was Not man made or ball lighting.While we were watching it a man drove up. He had been following it across the desert from highway 395.The strange thing was , he was in the military and said he had seen this type of craft before outside a base in Colorado but only at night.Stead is a decommissiond Air Force base.After a few minutes it slowly rose up,again without a sound reached a height of a hundred feet or so then it was gone.