Darfur's underground 'megalake'

An ancient underground lake the size of Lake Erie has been discovered in Sudan, raising hopes for an end to the Darfur conflict. Boston University geologist says radar technology points to a 'megalake' of water underground in the Darfur region of Sudan, and says building wells there could bring peace to the region. Widespread environmental problems are the root cause of Sudan's violence, according to the U.N.