 But for a very long time, it was a bit unclear which one, if they were related outages, which one may have caused the other, if that had been the case, or if it was in fact just the world's worst coincidence and two major pieces of software used by global companies all around the world, whether they'd both just kind of gone down at once and caused this sort of disastrous situation. ABC reporter Casey Briggs speaking to me there from Sydney, 6.15 GMT. This is the BBC World Service.