Happened to me about 2 years ago into ATL. We cleared the fence, about to land, then went back up, leveled out over downtown. Pilot said an aircraft did not clear the runway. I was connecting to LAX, a guy sitting behind me on that flight was talking about it to his seat companion, I turned around and asked if it was the flight from PIT, he said yes! He said he was sitting next to a window, we flew right over an RJ on the runway.