Missouri National Guard stand watch outside a store in Ferguson
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Ferguson shooting: Protests spread across US

A dozen US cities have seen new protests over the decision not to charge a white policeman who shot a black teenager in Ferguson, Missouri.

Demonstrations from New York to Seattle were mostly peaceful but rioting broke out in Oakland, California.

There was some unrest in Ferguson itself, with police making 44 arrests, but the town did not see rioting on the scale of Monday night.

The officer who killed Michael Brown there says he has a "clean conscience".

Jon Sopel reports.

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