A new Nationwide Retirement Institute survey paints a stark picture: most Americans approaching retirement do not actually understand the program they are banking on. Only 21% of respondents correctly identified their full retirement age based on their year of birth, and the average adult answered just 8 of 15 true-or-false questions about Social Security correctly. ... The Nationwide Social Security Survey Says Most Americans Are Flying Blind on Benefits, Here’s the Income Strategy That Fills t