Mohammed Hafiz, a 37-year-old, holds a picture of his lost son as he describes in his house in Baghdad on Thursday, Oct. 4, 2007, how his 10-year old child, Ali Mohammed died, after the 16 Sept. attack by the Blackwater USA contractors. Iraqi authorities are demanding the US government sever all contracts here with Blackwater USA within six months and pay $8 million in compensation to the families of each of 17 civilians killed when the firm's guards sprayed a traffic circle with heavy machine gun fire for 20 minutes. [Agencies]