I can't believe I missed this but, last November, according to Jon Hilkevitch of the Chicago Tribune, "A flying saucerlike object hovered low over O'Hare International Airport for several minutes before bolting through thick clouds with such intense energy that it left an eerie hole in overcast skies, said some United Airlines employees who observed the phenomenon.... The sighting occurred during daylight, about 4:30 p.m., just before sunset.
"All the witnesses said the object was dark gray and well defined in the overcast skies. They said the craft, estimated by different accounts to be 6 feet to 24 feet in diameter, did not display any lights.
"Some said it looked like a rotating Frisbee, while others said it did not appear to be spinning. All agreed the object made no noise and it was at a fixed position in the sky, just below the 1,900-foot cloud deck, until shooting off into the clouds."
Luckily, the UFO found an open gate at Midway.
23 minutes ago