Angular Saucer-Like Craft Hovered Over Tree - Could See Movement Inside

I saw a hovering craft about 30-40 ft above the ground over a large tree very close to the building that I was in - I was on the second floor of that building.  I could not tell the exact size of the thing, but based on the limitations imposed by the adjacent building and tree, I would guess it to be about 35 to 50 ft diameter.  A large wooded area was behind the building so there was very little light in the vicinity.   
I could see a series of windows with a reddish backlight coming from inside (like the glow from aircraft instrument panel lights), and I could make out several forms inside the windows making movements -as if seated at a control console.  The craft was about 100 to 125 feet from where I was.  
I am not exactly sure about the shape because it was so dark (more a vague outline), but it appeared saucer like (but more angular like the lines of today's stealth fighters).  I was more focused on what I saw inside the windows.  The windows were closely spaced and trapezoidal in shape. 
I don't remember any noise or any other associated lights.
Witness indicates that date of incident is approximate.  PD