By Bob Semro July 30, 1965, was a milestone in American history. On that day, the Social Security Act of 1965 was signed into law. That legislation, implemented a year later (45 years ago), introduced two new programs, Medicare and Medicaid. We take them for granted now, often without realizing how much they have achieved and how much we rely on them. In 1964, before the implementation of Medicare, 49 percent of Americans 65 years and older had no health care coverage and 30 percent of seniors lived below the poverty line. The average life expectancy in the United States…