Disk shapped saucer over the city of Chicago.

It was around 7pm on a summers evening when I, my Mother, Father, and two brothers saw a disk shaped object in the sky. I would say it was about 100 yards above us. It had lights around the outter rim, which were red and green and flashing. It maintained a motionless station in the sky as we continued to observe it. I got the impression someone was looking down on us, I was 15 years of age at that time. After about 5 min. it first moved off slowly traveling in a north easterly direction heading out over lake Michigan then it suddenly speeded up in a flash and was out of sight in a matter of a couple of seconds. The most interesting fact I recall about that day is, after the sighting was completed non of my family members discussed what we saw. Everyone went back to what ever it was they were doing as if it never happened. My father still lives in Chicago at this time at the age of 83 and my two brother's are now in their fifties, I am 57. My mother passed in 1967. Now this is going to sound strange, the next time I saw the alomst exact same object was in the movie "Close Encounters of The Third Kind." What we saw on that day looked just liked the first spaceship which first came over the landing area in that movie. If anyone wants to talk to me about it please e-mail me.
Date is approximate.  PD