The appalling Wikileaks video showing a US helicopter gunship mowing down a group of Iraqis, including two Reuters journalists, two children, and a pair of Good Samaritans whose only offense was to come to the aid of a badly injured man, continues to provoke reaction. Reader Cliff White writes: You can't help wondering after watching that terrible video if killing has just become a game to those soldiers in the helicopter.  It's both terribly disturbing and dismaying to listen to their casual banter as they go about their "work".   Even when they learn that children have been injured it's no big...