What is behind the latest resurgence of fighting in Eastern DR Congo?

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There has been a resurgence of fighting in eastern Democratic Republic of Congo involving rebels from the ethnic Tutsi-led M23 movement. Thousands of civilians have fled the violence. What is behind this latest escalation and what do the rebels want? Nurses and midwives in Nigeria protest new rules for verifying their qualifications to foreign nursing boards. Why are cases of prostate cancer increasing in South Africa ?