U.N. and Congolese Troops Struggle to Halt Lightning Rebel Attack

United Nations troops and their local allies are fighting a desperate rear-guard action to prevent rebels from seizing Goma, a key city in the eastern Democratic Republic of Congo. 

Aid workers estimate as many as 300,000 people are fleeing lightning advances by the Rwandan-backed M23 rebel group, which has taken two strategic towns on the approaches to Goma over the past several days.