UFO Sighting in Bethlehem, Pennsylvania on 1990-12-20 21:00:00 - Mothership. discs leave keep coming lower then ascend back to mothership.

1) talking 2) looked up 3) i am pilot. stationery ufo. 4) green huge mothership.Stationery. est alt. 100k feet. symmetrical lights. discs came from. did aerobatics. lower and lower. power out as come near. after 15-20 minutes return mothership. mothership speeds up and away in seconds. 5) i am a physician. i was not surprised. 6) spec away upwards.