Flight MH17 with a Boeing 777-200 operated by Malaysia Airlines broke up in the air probably as the result of structural damage caused by a large number of high-energy objects that penetrated the aircraft from outside. This is mentioned in the preliminary report on the investigation into the crash of MH17 that has been published today by the Dutch Safety Board. There are no indications that the MH17 crash was caused by a technical fault or by actions of the crew.