National Guard called to Ferguson
The US state of Missouri is sending the National Guard to the town of Ferguson as protests escalate over the police shooting of an unarmed black teenager.
Governor Jay Nixon signed an order to "help restore peace and order and to protect the citizens of Ferguson".
The decision was made as police clashed with angry crowds shortly before a second night under curfew began.
Aleem Maqbool reports.
- From the section US & Canada