In this photo provided by the National Transportation Safety Board (NTSB), NTSB investigator Brian Murphy shows the depth of the debris field during a survey at the accident scene of Asiana Flight 214, in San Francisco, California on July 9, 2013. The Boeing 777 was en route from Shanghai with a layover in Seoul, South Korea, carrying 291 passengers. Two people died and more than 180 were injured. Pilot Lee Kang-kook had logged more than 9,000 hours on various aircraft, but only 43 hours on the Boeing 777 and was considered still in training on that aircraft. UPI