THE HORRORHaditha fronts the news magazineshttp://www.cnn.com/2006/WORLD/meast/06/04/time.cover/index.html[Time] The killings of 24 Iraqis one morning last November may mark a terrible turning point in America's already shaky presence in Iraq. . . Like the Abu Ghraib prison scandal before it, what happened at Haditha threatens to become one of the war's signature debacles, an alleged atrocity