Potholes are bad enough when you hit one in your car, but how about a plane landing at 200 miles-an-hour? Officials at General Mitchell International Airport in Milwaukee report several flights were delayed Tuesday afternoon and some were diverted. Potholes had been discovered on two of the busy airport’s runways. Both runways were closed while repairs were made. The material used by the repair crews needed some time to harden, so the runways were shut down for about two hours. No planes were damaged and no injuries were reported.