On May 25, 1979, American Airlines Flight 191, a McDonnell-Douglas DC-10-10 aircraft, on its way from Chicago to Los Angeles, crashed just after take-off near Chicago-O'Hare International Airport, Illinois. During the take off the left engine and pylon assembly and about 3 ft of the leading edge of the left wing separated from the aircraft and fell to the runway. Flight 191 crashed killing two hundred and seventy one persons on board and two persons on the ground. The accident remains the deadliest airliner accident to occur on United States soil.