Beeping sounds and unidentifiable greenish, foggy light that flooded area for approx. 3 min. in the early morning hours.

Our third son was born on Sept 20, 1966. We were just home from the hospital, sleeping in the living room of the older farmhouse on our acreage in the country in Mongomery Co. Iowa. Our newborn was in a small room just around the corner so we couldn't hear every gurgle. I was awakened around 1 a.m. by a beeping noise. At first I thought I was dreaming but then heard it again and realized that an eerie green light was coming in the window and was flooding the orchard to the east of the house. I woke my husband who saw it too and we immediately rushed to make sure the baby was OK. We weren't able to see anything but the light. Either it was foggy out or the light itself had a foggy quality. We were aware if it for about 2 to 3 minutes and then it moved away to the southeast and was gone. The following morning some of the local radio stations carried reports of UFO sightings to the south and east of us. We did not see a craft - only the light coming from not too high over the orchard. I would say it was more of an aura rather than a direct beam.
Date is approximate.  PD