GULF OF THAILAND – Despite the efforts of planes, ships and search crews, officials have not found any sign of a Malaysia Airlines flight that went missing two days ago. In that image, a U.S. Navy MH-60R Sea Hawk helicopter, lands aboard during a crew swap before returning on task in the search and rescue for the missing Malaysian airlines flight MH370 on March 9, 2013 at sea in the Gulf of Thailand. The flight had 227 passengers from 14 nations, mainly China, and 12 crew members. According to the Malaysia Airlines website, three Americans, including one infant, were also aboard. (Photo by Senior Chief Petty Officer Chris D. Boardman/U.S. Navy via Getty Images)