Which agency is tasked with organizing, training, and equipping aerospace forces?

The agency responsible for organizing, training, and equipping aerospace forces is Headquarters, United States Air Force (HAF). The HAF plays a critical role in overall Air Force management, ensuring that personnel are adequately trained and that the right resources are allocated to meet operational readiness requirements. It sets policies and guidance that drive the organization and development of airpower capabilities, emphasizing the importance of maintaining a well-trained and properly equipped force to achieve the Air Force's mission.

The other options, while significant within the military framework, do not solely hold the responsibility for these tasks. The U.S. Air Force Academy primarily focuses on educating and training future Air Force leaders, but it does not oversee the broader organizational and operational aspects. The Department of Defense encompasses the entire military framework, overseeing multiple branches but lacking the specific focus on aerospace forces that HAF provides. The Air Force Operational Test and Evaluation Center focuses on testing and assessing the capabilities of systems rather than the overall organizational and training aspects of aerospace forces.