Sudan's warring sides have agreed to a nationwide ceasefire for 24 hours starting this morning to allow the unimpeded movement and delivery of humanitarian assistance throughout the country. The agreement marks the latest in several failed attempts to stop weeks of fighting between the Sudanese army and the Rapid Support Forces paramilitary group. More than 1.4 million people have been driven from their homes within Sudan and 780 civilian deaths have been reported. The United Nations says aid that could reach about 2.2 million people had been delivered since late May but that some 25 million - more than half the population - are in desperate need of assistance. Leni Kinzli, is the Head of Communications for the World Food Programme in Sudan...