The United States Air Force operates several aircraft that have been developed exclusively for its use, highlighting the country's capability to maintain a robust and independent military aviation sector. These aircraft include the Lockheed C-5 Galaxy, F-22 Raptor, B-2 Spirit, SR-71 "Blackbird," and the upcoming B-21 Raider.
The Lockheed C-5 Galaxy, with 131 units built, serves as a strategic airlifter for the US Air Force. Despite its potential for international sales, no foreign country has shown interest in acquiring such a large transport aircraft. The C-5M Galaxy variant represents an upgrade of 52 of these units. The aircraft provides the US with unparalleled strategic airlift capabilities across global distances.
Another notable aircraft is the F-22 Raptor, which was initially planned for a larger production run but ended with 187 units due to budgetary constraints. It remains one of the few US fighter jets under an export ban by Congress. "While the US does sell its F-35 to foreign allies and partners, it is very selective about who it sells it to and often imposes 'onerous' conditions for its sale."