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.
In 1935, President Franklin Roosevelt signed the Social Security Act. This new federal legislature started the collecting of taxes in 1937. Since then, working citizens across the United States began paying into social security in order to have a form of guaranteed income once they reached retirement age. The Social Security Act was initially meant to be a form of basic retirement for working individuals. However, in 1939, an amendment was made to the act that allowed spouses and/or children to begin receiving social security survivor benefits if a parent or spouse was deceased and qualified for social security income.