One year anniversary of the disappearance of MH370

The head of the Australian agency leading the search explains why he's cautiously optimistic they'll find the aircraft debris on the sea floor. It's one year ago this Sunday since Malaysian airlines flight MH370 disappeared without a trace, carrying 239 passengers and crew. The Boeing 777 was on a flight from Kuala Lumpur to Beijing when it vanished, starting a massive search in the Indian Ocean, first for surface debris, then a far more in-depth search involving planes, radar and mapping of the seabed. In October, a painstaking deep sea search of a priority area of the seafloor began, and so far over 40% has been covered. Australia, China and Malaysia are now discussing whether to call off the search and a decision could be made within weeks. The head of the search is Martin Dolan, Chief Commissioner of the Australian Transportation Safety Board, who still feels cautious optimism.