they have been working intermit ently to do that. >> alison sider from "the wall street journal," thanks so much. >> thanks for having me. >> stewart: september is national suicide prevention awareness month. the suicide rate in the united states is on the rise and has been for the past 15 years. on average, there are 117 suicides in the u.s. every day and an estimated 25 attempts. in an effort to address the problem some scientists and medical professionals are using advances in technology to help predict and possibly prevent suicide. >> reporter: in new york city this summer, more than two thousand people gathered for the biannual "out of the darkness" overnight walk. it covers 16 miles from dusk to dawn, in memory of those who have died from suicide. rosemary fuss traveled from boston. it's the tenth time she's walked for her son, tommy. >> we are part of a family. we are survivors. and, we are committed to saving other precious lives. we can't bring our loved ones back, but we can certainly do something to help others. >> reporter: the event raises awareness and money to research sui