Pope John Paul II signs new Roman Catholic code incorporating changes brought about by Second Vatican Council(Jan. 25). Second space shuttle, Challenger, makes successful maiden voyage, which includes the first U.S. space walk in nine years (April 4). U.S. Supreme Court declares many local abortion restrictions unconstitutional (June 15).Sally K. Ride, 32, first U.S. woman astronaut in space as a crew member aboard space shuttle Challenger(June 18). U.S. admits shielding former Nazi Gestapo chief Klaus Barbie, 69, the “butcher of Lyon,” wanted in France for war crimes (Aug. 15). Benigno S. Aquino, Jr., 50, political rival of Philippines president Marcos, slain in Manila (Aug. 21). South Korean Boeing 747 jetliner bound for Seoul apparently strays into Soviet airspace and is shot down by a Soviet SU-15 fighter after it had tracked the airliner for two hours; all 269 aboard are killed, including 61 Americans (Aug. 30). Terrorist explosion kills 237 U.S. Marines in Beirut (Oct. 23). U.S. and Caribbean allies invade Grenada(Oct. 25).