Once you have enabled AI Servo mode and selected the correct focus points (if you want to adjust them from how the camera is currently set up), the only control you need is the shutter button -- just pressing this halfway will enable focus tracking on the focus points that are enabled.
The Social Security Act was enacted August 14, 1935. The Act was drafted during President Franklin D. Roosevelt's first term by the President's Committee on Economic Security, under Frances Perkins, and passed by Congress as part of the New Deal.
The 1965 Medicare Amendment to the Social Security Act. On July 30, 1965, President Johnson signed the Social Security Amendments which established Medicare and Medicaid, promising that they would improve a wide range of health and medical services for Americans of all ages..