Update, related: Reuters reports new ISIS audio insisting they brought down Russian plane in Sinai, “will disclose mechanism when we want and in the way we want.”
I still think it broke apart in midair because of a crack in the tail and an incomplete repair. Same thing happened to a Chinese plan recently. New airplanes are made of composite parts and there is almost no what a crack can be detected if it is internal to the composite material the way you can with metal/aluminum parts.
Do you have a link to the Reuters article about ISIS audio? Thanks