AdvertisementOpinionFor San Diego's Homeless, One Man Offers HopeMarch 07, 2011Pam FesslerfacebookEmailDavid Ross, also known as Waterman Dave, hands out bottled water and energy drinks from his trunk in San Diego. The 75-year-old retiree has made it his mission to help the homeless — even if it's just with a hug or a kind word. (NPR)