The Governor of the American state of Missouri says he is tripling the size of the National Guard force in the St. Louis suburb of Ferguson, amid fears that there could be another night of rioting there.
Protesters across the US are demonstrating a Grand Jury decision not to prosecute the police officer who killed unarmed black teenager Michael Brown in August.
Our US Correspondent Simon Marks reports.
IN: "The stage is …."
OUT: "...grand jury's decision"
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