The Agena Program was a series of American space missions conducted by NASA from 1959 to 1973. It primarily involved the development and use of the Agena spacecraft, which served as a versatile platform for various purposes, including satellite deployment, scientific experiments, and military reconnaissance. The program played a crucial role in the early years of the U.S. space program, contributing to advancements in orbital technology. The Agena spacecraft was designed to be launched atop a Thor or Atlas rocket and could be used in both manned and unmanned missions. It was instrumental in supporting the Gemini Program by providing a target for spacecraft rendezvous and docking exercises. Overall, the Agena Program significantly enhanced the United States' capabilities in space exploration and satellite operations.