In this March 9, 2014 file photo, a Chinese relative of passengers aboard a missing Malaysia Airlines plane, center, cries as she is escorted by a woman while leaving a hotel room for relatives or friends of passengers aboard the missing airplane, in Beijing, China. Ten days after Malaysia Airlines Flight 370 disappeared with 239 people aboard, an exhaustive international search has produced no sign of the Boeing 777, raising an unsettling question: What if the airplane is never found? (AP Photo/Andy Wong, File)