one hour to go until the bomb was supposed to explode. p. coming up -- >> i say to the police, i'm, like, "what do you want me to tell them?" >> matt needed answers. and he didn't have much time to get them. >> your mind starts to think about weird things like, "am i gonna know it when it goes off? what are you gonna feel?" >> when dateline continues. whes i think dentists will want to recommend sensodyne rapid relief. sensodyne rapid relief builds a layer fast on the tooth's surface over those sensitive areas, which means patients are going to get fast relief from their sensitivity. sensodyne rapid relief is clinically proven to work in 3 days. i think dentists will want to recommend this product because it's going to help their patients and that's what we are trying to do is help patients. [ soft piano music playing ] mm, uh, what do you do for fun? -not this. ♪