Summary : Large Aluminun-colored "Saucer"

Two couples - both husband and wife.  Large metallic disc, hovering noiselessly atabout 1/2 mile distance.  At least 200' indiameter. No visible seams or antennas on aluminum colored craft. No windows. Many"plasma-like" bright white "jets" of light coming from small irregularly spaced "ports"around the circumference of the craft on its outer edges. Another small "dome" on top of craft...no "dome on the bottom.  In other words...shaped like two "saucers" placed together (one up - one down), with another small "saucer" placed upside-down on the top"saucer".  Hovered and made rapid right-angle turns.  We followed for 50 miles in car.  It speeded up, gained much altitude, left a contrail, turned an orange color, and wentover the western horizon. The craft alsoslowly rotated clockwise (viewing from below),while we viewed at close range. I reported to nearby Chanute AFB (now closed), but they laughed at our story. None of use are alcohol abusers or use drugs, and we have all been married many years to one-another now.