George Zimmerman sues NBC Universal over edited 911 call:  "George Zimmerman accuses NBC Universal of "the oldest form of yellow journalism",  NBC edited the audio tape of his 911 call to make him sound racist, his suit says.  Zimmerman is charged in the shooting death of Trayvon Martin, 17... the lawsuit said.  Zimmerman is seeking "damages in excess of the jurisdictional limit" in Seminole County Circuit Court in Florida, where the lawsuit is filed.  "NBC saw the death of Trayvon Martin not as a tragedy but as an opportunity to increase ratings, and so set about to create the myth that George Zimmerman was a racist and predatory villain," the lawsuit said."