What does the sphere in the lower half of the Air Force symbol represent?

The sphere in the lower half of the Air Force symbol represents the globe and the global obligation that the United States Air Force has to protect and serve. This design element emphasizes the Air Force's worldwide reach and its commitment to maintaining global security. It signifies the importance of the Air Force's role in international affairs and its ability to operate and provide support anywhere around the world, demonstrating a readiness to respond to threats and uphold peace on a global scale. This reflects not only the operational capabilities of the Air Force but also its responsibility in safeguarding national interests globally.