What's fuelling the conflict in Sudan?

Two weeks of violence have plunged Sudan into turmoil. Hundreds of people have been killed and tens of thousands have fled. The country is home to more than 500 ethnic groups and is rich in natural resources. Are these factors linked to the conflict?  Join host Tom McRae. Guests:  Khalid Medani - Associate professor of political science and Islamic studies at McGill University. Raga Makawi - Editor of African Arguments and author of  'Sudan's Unfinished Democracy.' Waleed Madibo - Founder and president of Sudan Policy Forum.