It's been a dark week in Papua New Guinea after violent rioting in Port Moresby spread to other parts of the country. A state of emergency is now in force after 15 people were killed and shops and businesses looted in the capital and in the industrial hub of Lae. The Prime Minister has suspended the Police Commissioner and other senior bureaucrats in the wake of riots, which were sparked by a protest by police and other public servants over a reduction in their pay.