Malaysian officials now say that there's firm evidence flight 370 flew into a remote area of the Indian Ocean, where it could only have crashed into the water. Yet a psychologist says even that certainty will likely not provide closure to families of the passengers.
It took two years to find the flight data and cockpit voice recorders for an Air France jet that disappeared over the Atlantic Ocean in 2009. In that tragedy, the crash site was found within two days of the accident. With Malaysia Airlines Flight 370, the search may be much harder.