Nine Egyptian nationals suspected of involvement in the sinking of a boat carrying hundreds of migrants off the Greek coast last week have pleaded not guilty after appearing in court. The men were arrested on suspicion of people smuggling and other offences following the disaster, which saw at least 78 people killed. We talk to someone who has been involved in migrant boat rescue missions in the Mediterranean Sea.Also in the pod: The effect of power shortages on South Africa's water supply.And 10 years of K-Pop in Africa.