Support WBURHealth Problems Compound For Aging HomelessPlay07:14Download AudioPam FesslerMarch 13, 2013 ShareTony Lithgow, 49, and Andrea Mayer, 51, live together on the streets of Baltimore. Researchers say the aging homeless population is due to younger baby boomers who came of age during the 1970s and '80s, when there were back-to-back recessions. (NPR)