Imagine for a moment that you were one of the survivors of Asiana Airlines Flight 214. How would you deal with the airline, and state investigators, and federal investigators, and all the other parties involved? Wouldn't it just be chaos? No, not necessarily. The National Transportation Safety Board (NTSB) has a Transportation Disaster Assistance Division (TDA) that "coordinates the disaster response resources of federal, state, local, and volunteer agencies:"
They also provide assistance and advice to first responders and legislators. So, whether it's a plane, train, or automobile that crashes, if the NTSB decides to investigate, the TDA will be there to help.