Between 1854 and 1929, 250,000 orphans - at peril in the dangerous, overcrowded streets of New York - were placed on trains and sent west to live with new families. A desperate solution to a desperate problem, some of the stories turned out well and some far from well. The bond between the riders lives on in their descendants, many of whom continue to search for answers about their ancestry. Mo talks to the daughter of a rider, plumbs the CBS News archives for voices of the riders themselves, and tracks down the last survivor.