homeless. they live with serious medical conditions. heart disease, diabetes, mental illness. our next hero seeks these men and women out to bring them care in pittsburgh, pennsylvania. to tell us about his remarkable work is a proud supporter of direct relief which provides essential medical resources for people in need and during disasters, as well as support of the trevor project, he's the star of the upcoming film "snowden," please welcome pittsburgh native, zachary quinto. ♪ [ applause ] >> do i matter? when it's 10 degrees outside and the wind's blowing and all you've got is a cardboard box in an alley, you're thinking, do i matter at all to the people passing me by? every day in my hometown, dr. jim withers makes sure they know the answer. 23 years ago, he rubbed dirt in