PHOTO: AFP/EAST NEWS Haitian policemen patrol in the streets in Port-au-Prince where people have been looting destroyed stores, after last week's devastating quake, on January 21, 2010. An extra US military contingent of more than 4,000 troops is expected to reach Haiti Saturday to boost the still struggling aid effort in the aftermath of a killer quake, a spokeswoman said. AFP PHOTO / THOMAS COEX