 Ah, that's one of those moments where you're halfway through a sentence and suddenly it all goes ominously quiet. I think we've probably concluded our conversation, or I was about to do that, but less abruptly than it turned out with Tonya Mastroboni. But many thanks to her for joining us from Essen, and no doubt more on that gathering a little bit later in the day here on the BBC World Service. You're listening to Weekend.