Broadcast journalism students aspiring to become the next Roone Arledge ’52CC, the late ABC News president who helped create Wide World of Sports, 20/20, and Nightline, now have a training facility at Columbia equal to the task.The Roone Arledge Broadcast Lab, which opened in January, includes an anchor desk, a podium, and a sit-down interview space all designed by ABC News, as well as a digital control room, a newsroom outfitted with 40 edit stations, and an audio recording booth. Every week, students produce an hour-long news program streamed on the J-school’s Web site.The lab’s professional technicians are also available to help faculty, staff, and students from around Columbia produce their own instructional video or audio materials.