Which U.S. military organization oversees air operations today?

The Department of the Air Force is responsible for overseeing air operations in the U.S. military today. This organization includes the United States Air Force, which plays a crucial role in defending the nation through air and space power. The Air Force is tasked with various operations including air combat, airlift, reconnaissance, and other missions that leverage aerial capabilities. This oversight ensures that air operations are effectively coordinated and integrated within the broader context of U.S. military strategy and national defense.

In contrast, while the U.S. Navy is primarily focused on naval and maritime operations, the U.S. Army is land-based and involved in ground operations. The National Guard serves both state and federal roles but does not have sole responsibility for air operations either. Their missions can vary widely, including domestic support and overseas deployments, but air operations fall within the jurisdiction of the Department of the Air Force specifically. Therefore, the correct answer reflects the centralized authority and operational focus of air operations within the military framework.