all three people on board a light aircraft were killed when it crashed early on Monday in bad weather conditions while trying to land at an airport in the Johannesburg area, authorities in South Africa said.CEO of Lanseria airport, said the pilot and two passengers died when the Beechcraft King Air plane crashed off the side of the runway just before 7 a.m. Monday.He said that an investigation is underway. It was raining heavily and visibility was poor at the time of the crash.