marcia coyle can the national law journal." thanks so much. >> my pleasure, jeff. >> ifill: now, the burden of living with a never-ending noise. a condition tone as tinnitus, also pronounced tin-night helpus, and what science is trying to do to make it easier to live us. we have a report from the newshour's science correspondent miles o'brien. a warning for viewers with tinnitus: there are a couple of moments in this story where listening to it may cause or worsen ringing in your ears. >> we're going to bauers i.t., a green bus transportation company. >> reporter: like any marine sergeant worth his stripes, jarom vahai is always looking out for his brothers in arms. >> i've been bringing veterans to them with their resumes and setting them up on interviews. >> reporter: these days, he is on patrol near his home in san francisco. his objective: jobs for unemployed veterans. >> treated it just like it was a mission, just like it was something that i was targeting and i attacked. >> reporter: but jarom has found one hill he cannot