MY BROTHER IN LAW WHO IS FROM VANCOUVER BC. AND HAS DUAL PASSPORT WAS IN WEST WENDOVER FOR GAMBLING PURPOSES.

HAVING BEEN IN THE US.NAVY DURING EARLY 70,S HE MET UP WITH A EX AIR FORCE GENTLEMAN WHO HAD BEEN AT WENDOVER AIR FORCE BASE IN 1962.  THIS MAN USE TO COMMUTE TO SALT LAKE ON WK. ENDS USUALLY 2.5 HR.DRIVE THRU THE DESERT.HE WOULD LEAVE LATE FRI. AND WHILE DRIVING AT AROUND 2AM WOULD SEE A BLACK DISK WITH DOME OUT DRIVERS WINDOW MATCHING HIS SPEED AT AROUND 50 FEET AWAY.
THE NIGHT HAD A FULL MOON BUT DISC WAS SHINY BLACK  NO LIGHTS. THIS EVENT HAPPENED MANY TIMES BUT ALWAYS AT AROUND 2 AM WHILE DRIVING APROX. 80 MPH.THE MAN ALWAYS THOUGHT THE OBJECT WAS SOME FORM OF SECRET AIRCRAFT JUST PLAYING GAMES. 
THE DISC WAS ABOUT 20 FT LONG AT ROUGHLY SAME HEIGHT AS CAR PROBABLY SLIGHTLY ABOVE TO AVOID COLLISSION WITH TERRAIN.     
IM SORRY ABOUT LACK OF DETAIL BUT THIS IS  SECOND HAND INFO.
Witness indicates that the date of the incident is approximate.  PD