A midair collision involving two small planes in southern Arizona killed two people Wednesday morning, authorities said. Federal air-safety investigators said each plane had two people aboard when they collided at Marana Regional Airport on the outskirts of Tucson. One plane landed uneventfully and the other hit the ground near a runway and caught fire, said the National Transportation Safety Board, which is leading the investigation and cited preliminary information before its investigators had arrived. MORE: https://www.wthr.com/article/news/nation-world/plane-crash-arizona-midair-collision-aircraft/507-74fea805-bec2-4a46-a99b-aa55ccdaac4b