On the two-year anniversary of the disappearance of Malaysia Airlines Flight MH370, search teams in Australia continue to scour the Indian Ocean for the missing Boeing 777 as family members of the victims gather to mark the solemn date, which is still punctuated by many more questions than answers.
In Beijing, some supporters held a protest near the Malaysian embassy, shouting slogans and demanding more information about what has escalated into one of the biggest mysteries in aviation history.
A piece of wing found on Reunion Island last year confirmed presumptions that the airplane was lost somewhere in a vast expanse of the Indian Ocean. All 239 people aboard the Beijing-bound flight from Kuala Lumpur are presumed dead.
A wreckage area of more than 10,000 square miles is now being scanned, a process expected to be completed by summer. Australian officials have said the search, estimated to have cost more than $130 million, will likely end then.
Without the wreckage or the black boxes, investigators have been unable to determine what caused the crash. Lacking these vital clues, we may never know what happened to the doomed airliner.