Grey oval object with white lights rotating underneath. Object made no sound as it hoovered. Moved quickly

I was 17 years old in Cleveland Job Corps on Carnegie Ave. I don't remember which month it was - I was there from April to November. It was probably around June to August. 
It was about 10pm one summer night when 6 or 7 girls came busting into my room running to the window.  They were very upset, talking about a space ship but I was laying in bed, reluctant to believe them.  When I got to the window.  I saw a grey looking oval shaped object.  From my view, we were looking underneath the ship. 
There were square like boxes underneath that white lights were passing over.  We were on the 9th floor and I could see many girls in their windows looking at the ship and screaming and hollering.  The object just hoovered there for what seemed like eternity and then just moved quickly out of view. There was no sound from the ship. 
We were so hysterical the director of Job Corps called a meeting in the middle of the night to calm us down.  There were 400 women in that building that night and at least 250 witnessed this ship.  
This was not a blimp or airplane. Picture in your archive August, 1973; 9:00 PM.Princeton,Indiana (USA)looks like the bottom except there was boxes of lights rotating underneath and I couldn't see what the top looked like.  
Except for family, I have never discussed this because it is so scary to remember.  When I saw the picture in your archive I couldn't stop shaking and decided to share my long held secret. 
I would be interested in talking to other Job Corpsmen that were there that night to see how they cope with this memory. It still scares me today, 32 years later.