'Almost nothing happening' in obesity prevention in New Zealand according to nutrition professor

One in five children across the world are overweight or obese according to a recent study from China’s Sichuan university and in New Zealand child obesity is the second highest in the OECD. But what is New Zealand doing to tackle the problem? We talk to the Professor of Population Nutrition and Global Health at the University of Auckland, Dr Boyd Swinburn, who backs a tax on sugar. The Prime Minister is in the middle of of a meeting whirlwind, including with the Ukrainian President, as he attends the Nato summit in Washington DC. Plus, a couple who want to get away from civilisation are building a home on an ex-army Unimog truck.