The engine of a Vietnamese Air Force Russian-made AN-27 seen through a window as it returns from a search operation over Vietnam's southern sea for missing Malaysia Airlines' flight MH370 on March 14, 2014. The needle-in-a-haystack hunt for the missing Malaysian airliner spread to the vast Indian Ocean after the White House cited "new information" that it might have flown for hours after vanishing nearly seven days ago.  AFP PHOTO/HOANG DINH NAM        (Photo credit should read HOANG DINH NAM/AFP/Getty Images)