This incident has exposed what I think could be a major disaster waiting to happen at O'Hare. If the aircraft had been landing on 10C instead of 10L. They would have had their excursion between taxiways P3 and P5. Take a look on Google Earth to see what is located at that position, a major dropoff on an exposed section of an underground roadway that crosses under the runways. It amazes ma that the FAA would approve this and every time I pass by it, I wonder if an airliner will drop into it at some point.