The UN’s rights chief tells us Russian forces have used cluster bombs in built-up areas in Ukraine – and that Ukrainian forces, may have used them too. Meanwhile in Afghanistan, Martin Griffiths tells us millions of ordinary people’s lives are hanging by a thread. In South Sudan, the UN refugee agency, UNHCR, has put the spotlight on the communities who’re using mud and anything else they can find, to keep floodwaters at bay. We’ll hear the latest research on migrant journeys, plus a more positive initiative from the WHO, to beat mosquito-borne sickness.