secure the scene like a crime scene. effectively they'll get all the investigators will have to leave so the ems, fire personnel, all of those people will have to be off the scene and at that point the ntsb does a 3d mapping of the crime scene. it's not a crime scene but they're going to treat it sort of like that. they will complete that 3d representation of the wreckage exactly as it is right now. nothing gets moved until that gets done and then all these functional teams that come in and they work on different things simultaneously, so human factors, the track group, a signal group, and equipment group and they all work together but in concert but separately to do their own investigations. >> there are so many elements when you see, and we're taking a look, to remind our viewers, live pictures right now. we're going to be continuing to show those as ashleigh and i continue our conversation. those crews when you think of all of the elements at play and what ntsb has to map out, pull together and to find in their