A silver Ball hovering over McCarran Blvd near Idewild park

When I was a young child under the age of 10, App. 1985 or 86.  My family and I were traveling from Reno, Nevada to Truckee, CA, to see my Grandpa, as were driving from our home in Lemmon Valley down Virginia we turned onto McCarran Blvd and there were cars parked everywhere along the side of the road and people were standing there looking up at the sky. 
We parked and got out and hovering in the sky was a giant silver ball shaped object, it was spinning in place as we stared at it.  I don't remember how long we stood there, but I remember looking at the other people and at this ball, and then all of a sudden jet fighters took off from right behind the MGM Hotel/Casino and the ball shot off at a extremely high speed and was just gone and then the 2 jets took off the same direction.  
I remember my parents talking to other people about it, and then we all drove away.
I remember there was never anything mentioned about it on the news or anywhere else.
I am 34 years old now and still remember it just like yesterday!
Witness indicates that the date of the sighting is approximate.  PD