Obama appeals for calm after Ferguson riots
US president Barack Obama has appealed for calm as enraged protesters set fire to buildings and cars and looted businesses after a grand jury decided not to indict a white police officer over the fatal shooting of unarmed black teenager Michael Brown in Ferguson, Missouri.
Ferguson burned through the night despite pleas for calm from Mr Obama and the family of the victim after prosecutors announced officer Darren Wilson, 28, faces no state criminal charges.
