President George W. Bush stood before a cheering crowd at a Dallas Christian youth centre last week, and told them about being 'born again' as a Christian.
'If you change their heart, then they change their behaviour. I know,' he said, referring to his own conversion, which led to him giving up drinking.
Behind Bush were two banners. 'King of Kings', proclaimed one. 'Lord of Lords', said the other. The symbolism of how fervent Christianity has become deeply entwined with the most powerful man on the planet could not have been stronger.
Few US Presidents have been as openly religious as Bush. Now a new book has lifted the lid on how deep those Christian convictions run. It will stir up controversy at a time when the administration is keen to portray its 'war on terror' as non-religious.