A search by a US firm for missing Malaysia Airlines flight MH370 is expected to complete its survey by mid-June, the Southeast Asian nation said on Saturday, as families marked the fourth anniversary of one of aviation’s greatest mysteries. Family members paid tributes and gave heartfelt speeches about what the incident intimately meant to them. Texas-based Ocean Infinity in January 2018 to resume the hunt for the plane, a year after the official search in the southern Indian Ocean by Malaysia, Australia and China was called off. They started the search on January 22 and has 90 search days to look for the plane. Malaysia’s civil aviation chief, Azharuddin Abdul Rahman, said the 90-day term will be spread over a longer period because the search vessel has to refuel in Australia and bad weather could be a factor.