Nicolaus Copernicus died in Frauenburg (now Frombork), Poland.
Ferdinand Ferber makes his first aerial tests in Chalais-Meodon, France with his No.6 bis glider fitted with a 12-hp Peugeot motor.
Orville Wright takes his 82-year-old father for his first airplane ride. Also on this day, Wilbur and Orville fly together for the only time in a six-and-one-half minute flight at Simms Station, near Dayton, Ohio.
First flight of the North American YF-100A Super Saber.
First flight of the Grumman EA-6B Prowler.
Apollo 10, USA Lunar Manned Orbiter, (May 18-26, 1969) Crew: Thomas Stafford, Eugene A. Cernan, John W. Young. Manned lunar fly-around and Earth return. Stafford and Cernan tested the Lunar Module, separating it from the Command and Service Module and descended to within 50,000 feet of the lunar surface. The astronauts acquired a large number of excellent 70-mm photographs.
American Airlines Flight 191, a McDonnell Douglas DC-10, crashed at Chicago's O'Hare International Airport. During the takeoff roll, the left engine and pylon separated from the wing. The crew continued the takeoff, but wing damage due to the engine separation also damaged the aircraft hydraulic system and caused retraction of some flight control surfaces. The aircraft rolled and crashed shortly after takeoff. All 258 passengers and 13 crew were killed. Two people on the ground were also killed. This is the deadliest accident in the airline's history and the deadliest on U.S. soil.
North of the Falkland Islands, Argentinian Air Force A-4 Skyhawk bombers sink the British destroyer Coventry with two 1,000-pound (454-kg) bomb hits and two Argentinian Navy Super Étendard strike aircraft sink the container ship SS Atlantic Conveyor with two Exocet anti-ship missile hits. Eleven helicopters are lost aboard Atlantic Conveyor.
The first flight of Airbus A319-133X ACJ, or Airbus Corporate Jet, an airliner-sized business jet takes place.
Boeing 727 tail number N844AA mysteriously disappears in Angola, along with Ben Charles Padilla.