the search for kate waring takes the a-team to a wild and desolate place. would they find there? when dateline continues. >> it was so awkward now, but necessary. the ones very private waring and their only daughters intensely personal struggles were now so glaringly public. they had to be. >> you can't sit back and hope that she will be found. i mean, we worked every day, all day long, trying to find her. >> that's when it hit home. kate was the latest of hundreds of people still lost in south carolina, and it seemed to china's and tom police weren't taking cases like theirs seriously. what about all those other families also desperate for help? the waring held a vigil for common cause. >> somehow or another, someone will be moved and will want to come forward and tell us where katie is. >> that was the public waring family. at home the private tom waring couldn't be help but be drawn to the play back on their voice mail to hear her voice. >> that, don please pick up the phone. coming back later. >> i would look at photographs of her, or play those voice m