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.
United States History. The Social Security Act. At approximately 3:30 p.m. on August 14, 1935, the Social Security Act* became law above President Franklin D. Roosevelt`s signature. The Social Security Act is one of the truly momentous legislative accomplishments in United States history.