BBC News | MH370: Missing plane search 'most challenging ever' BBC News The search for missing Malaysia Airlines flight MH370 is the "most challenging" ever seen, the man responsible for co-ordinating the search from Australia says. Air Chief Marshall Angus Houston also said that the search for the plane could take weeks. Wreckage of Malaysia Airlines Flight MH370 may never ... Search for MH370 'could drag on': Houston MH370 search most challenging yet: Houston |