U.S. Seeks to Limit Role in Liberia No decision has been made yet on how to use U.S. troops in Liberia. But Defense Secretary Donald Rumsfeld spelled out a very limited mission for any American forces that might be used there. He said those forces will support Nigerian peacekeepers, but not replace them. General Richard Myers, chairman of the Joint Chiefs of Staff, said there's no danger of this becoming another Somalia. NPR's Michele Kelemen reports.