After hovering motionless for hours, a mysterious arial light performs aerodynamically impossible maneuvers.

It was a warm summer night and I was up with my mother and visiting neighbors who lived in our apartment building. As everyone started leaving around 10:30, I accompanied them out the front door onto the patio. Someone looked up into the clear night sky and asked, "What's that?" Looking up, we saw a large very bright white light hovering motionless at a fairly high altitude. From each side protruded bright, stubby appendages of light that gave the appearence of wings, as in the classical Egyptian "winged-disk" symbol. We watched it for over 5 minutes, when suddenly it began to move. After travelling in a straight line, it abruptly began making a series of rapid acute-angle turns as if tracing out a complex geometrical pattern. After a minute of this, the light resumed a straight line trajectory and travelled out over Lake Michigan. The next day, the Chicago Sun Times ran a front page story complete with a photograph, stating that the mysterious light had been observed for several hours.
Date is approximate.  We will attempt to obtain the news article from the Chicago newspaper mentioned.  PD