Mystery of Malaysia Airlines flight MH370 one year on

An interim report into Malaysia Airlines flight MH370 has been published on the first anniversary of its disappearance.

But it has given no new clues as to what happened to the plane, which was flying from Kuala Lumpur to Beijing when it vanished with 239 passengers and crew on board.

Families of the missing have expressed anger and disbelief that they do still not know what happened to their relatives, as Jonathan Head reports.