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Congolese citizens look at tank shells lying next to the roadside, left behind by retreating government troops as they fled an assault by M23 rebels, in eastern Congo, Wednesday, Nov. 21, 2012. Thousands of Congolese soldiers and policemen defected to the M23 rebels Wednesday, as rebel leaders vowed to take control of all Congo, including the capital Kinshasa. The rebels organized a rally at Goma's Stadium of Volcanoes Wednesday after seizing control of the strategic city in eastern Congo Tuesday.(AP Photo/Marc Hofer)

Rebel uprising in Congo

A rebel group believed to be backed by Rwanda seized the strategic, provincial capital of Goma in eastern Congo on Nov. 20, in a development that threatens to spark a new, regional war, officials said. Democratic Republic

of the Congo (DRC) has been marked by widespread violence and atrocities that

continue to threaten regional stability.