When airports fall, cities aren’t far behind. The M23 rebels, just seven months old, have blitzed the city of Goma in Congo, taking control of strategic spots on Tuesday. The rebels, a splinter group of ex-soldiers, had been fighting the U.N.-backed Congolese military. The mineral-rich eastern city is home to 1 million and is said to be one of the last bastions preventing a humanitarian catastrophe. The rebels claim to be fighting for the people, though it’s been reported that they are supported by Rwanda.