But I just came back from the Lutheran Cathedral here in Copenhagen, where the Archbishop of Canterbury and Desmond Tutu presided over a truly powerful church service, which ended with the great bell ringing out 350 times. As it did, the bells began sounding in thousands of churches across central Europe and around the world, from the south Pacific to the north of Greenland. It’s one of the most powerful moments in this whole long campaign. Stick your head out the window–you may hear the sound of 350 in the air.