Today at almost exactly 1pm there was a 747 that seemed to be on approach to RFD. I was about 15 miles directly North of RFD and all other traffic (as minimal as it is there) was following the Rock river on the approach. This craft was quite low and seemed to be descending as it went to the south. I checked the airport - no such beast there today??
The plane was mirror on the bottom and blue on the top - oddly, it almost looked like AF1 747. I know it was a 747 for a fact as it had four engines (and was certainly not a 380).
Could this have been a Govt craft going to one of the many Govt contract places? (Woodward, Hamilton Sundstrand et al).