It is hard to find new words to describe Sudan's deepening humanitarian crisis, where 33 million people now need assistance. New UN-backed analysis warns that around 19.5 million people are facing acute hunger, with 14 areas still at risk of famine as conditions worsen across the country. Despite dangerous conditions in eastern Sudan, photographer Giles Clarke has gained access with support from the UN aid coordination office, OCHA. His photo-essay, Darfur's Survivors, tells the stories of five civilians affected by the war. He spoke to Daniel Johnson of UN News.