NBC News' decision to air an edited call from George Zimmerman to police in the moments before he shot Trayvon Martin was "a mistake and not a deliberate act to misrepresent the phone call," according to the president of the network's news division. The edit in question, which aired on the network's flagship "Today" morning show last week, made it appear that Zimmerman told police that Martin was black without being prompted, when, in fact, the full tape reveals that the neighborhood watch captain only did so when responding to a question posed by a dispatcher. Under growing public pressure...