live. we promise you will not miss a thing. >> we're watching some other news this morning. a third person has died as a result of that asiana flight in san francisco's airport last week. she'd been only identified as a young girl who had been in critical condition since the accident happened. meanwhi meanwhile, all four runways at the airport are now clear but, of course, the investigation into what caused the crash continues. cnn's casey wian visited the warehouse in california where the accident investigators are trained to put the pieces of this puzzle back together. >> oh, my god. >> reporter: several korean aviation accident investigators now looking in the asiana crash got their training here according to the aviation safety program. inside an old sears warehouse where the twisted wreckage of plane crashes serves as a classroom. >> what you see around here is a safety system that has failed. >> reporter: instructors took me through part of the training.