The Area 42 Airfield was a functional airfield located in Area 42 until it was destroyed by Crypto with an atomic bomb. The US Military were attempting to build a craft of their own, capable of flight. This posed a large threat to the Furon Empire, because if this technology worked, it would only be a matter of time until they foiled Crypto's plans.
Air Force General Jack with the Navy Admiral at the Area 42 airfield.
Many test flights are conducted from the real Area 51, and have been occurring since the 1960s.