Final answer:
Yes, the DoD Special Access Programs are under the purview of the Under Secretaries of Defense, as these positions are integral in overseeing such sensitive programs within the department's hierarchy.
Step-by-step explanation:
The statement that the Department of Defense (DoD) Special Access Programs (SAPs) are the responsibility of the Under Secretaries of Defense is true. The organizational structure of cabinet departments such as the Department of Defense includes secretaries at the top level followed by a hierarchy that includes undersecretaries, assistant secretaries, and deputy secretaries. These positions are critical for overseeing the myriad functions and programs within the department, including SAPs, which deal with highly sensitive information affecting national security. The undersecretaries and their teams work under the direction of the secretary of defense to ensure that these programs are managed appropriately within the confines of the necessary security protocols and regulations.