 Hugh Schofield in Paris, thank you. In an echo of the displays of loyalty seen when his father and grandfather ran North Korea, officials have started wearing lapel badges of Kim Jong-un, according to pictures released by state media there. It appears to be the latest step by the regime to strengthen its grip on power. We can talk to our Asia-Pacific regional editor, Celia Hatton. Celia, tell us more about these lapel pins in more detail and why they're so important.