craft seen near Seymore-Johnson AFB, N.C., 1960

It was the summer of 1960 and my brother and I were in our back yard around 4p.m. talking to our neighbor who had a small garden on our property.  My brother was around 12 years old and the neighbor was a male around 40 at the time.  We lived within 5-8 miles of Seymore-Johnson Airforce Base and were used to B-52's and Tankers flying directly over just prior to landing.  On this day, 3 to 5 tankers were landing one behind the other with approximately 20-30 sec. between them.  When the first one flew over, (which is about 1/2 mile up), my brother and I and the neighbor saw a round object, no color, just black, hovering just outside of the flight path, but at the same altitude as the tankers.  It was approx. the size of the horizontal tail section of the tanker, not very large.  It kept it's position until the last tanker flew over and then the object instantaneously began flying along side the tanker at the same speed.  This means it went from zero speed to whatever speed the tankers were flying, I'm guessing 200 mph.  The object followed the tanker until it went behind a row of trees.  The object did not seem to be making any sounds of it's own at least different from the tankers, but then the tankers were very loud and the object could have been making some kind of sound.  We told our parents who didn't seem too concerned and we never discussed it again.  We know it wasn't a bird or balloon, but it was an aircraft without wings, round or spherical and could go from zero to 200 mph. instantaneously.  We did not call the base either.
Date is approximate.  PD