More than seven years after a Malaysia Airlines plane was fired from the sky over Ukraine by a Russian-made Buk missile, the families of the 298 victims are still waiting for answers and justice. The trial of four suspects began in March 2020 in Amsterdam and grieving relatives are now taking the stand. Ninety-one of them have decided to do it in a period of three weeks. It is a key moment, during which they can express their emotion and anger at the tragedy. Report from our correspondents.