The possible loss of programs like Social Security, Medicare and Medicaid are big worries for the city’s seniors. Nahum Daniels talks about what we can do to prepare for retirement, and the amount of money we’ll actually need as we continue to live longer.  Beth Finkel talks about efforts to fight back, to give our seniors the security they deserve. And Caryn Reznick will talk about one of the most devastating issues facing seniors living in the city: isolation. She’ll talk about the city’s programs to keep seniors mentally and physically active.