Channel 39 will end its traditional newscasts by this fall to launch a new format called NewsFix, which discards on-camera anchors and reporters and focuses on natural sound and video to tell stories. KIAH employees were informed Thursday about the changes, which apparently involve reassigning anchors and reporters to new, off-camera duties and signal a sharp reversal from the station's recent advertising campaign focusing on its lead anchor, Mia Gradney. Roger Bare, Channel 39's general manager, said KIAH will be the pilot program for Tribune Broadcasting's NewsFix, which is expected to launch in late September or early October. "The core...