The end of the world is nigh; 21 May, to be precise. That's the date when Harold Camping, a preacher from Oakland, California, is confidently predicting the Second Coming of the Lord. At about 6pm, he reckons 2 per cent of the world's population will be immediately "raptured" to Heaven; the rest of us will get sent straight to the Other Place. If Mr Camping were speaking from any normal pulpit, it would be easy to dismiss him as just another religious eccentric wrongly calling the apocalypse. But thanks to this elderly man's ubiquity, on America's airwaves and billboards, his unlikely Doomsday message is almost impossible to ignore. Every day Mr Camping, an 89-year-old former civil engineer, speaks to his followers via the Family Radio Network, a religious broadcasting organisation funded entirely by donations from listeners. Such is their generosity (assets total $120m) that his network now owns 66 stations in the US alone.