Final answer:
The United States Air Force's service control point is the Air Force Installation & Mission Support Center (AFIMSC), responsible for providing support capabilities to all Air Force bases and commands.
Step-by-step explanation:
The act that serves as the United States Air Force's service control point is the Air Force Installation & Mission Support Center (AFIMSC). As part of the larger structure of the Department of Defense, which oversees elements of the U.S. armed forces including the Air Force, AFIMSC provides installation and mission support capabilities to all Air Force and Space Force bases, wings, squadrons, and major commands. The mission of AFIMSC is crucial in ensuring that efficient and effective support is available for the U.S. Air Force personnel and equipment, thereby maintaining readiness for offense and defense as outlined in the historical context of the National Security Act of 1947.