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An F-22 Raptor from the Air Force Flight Test Center at Edwards AFB, California, was flown to Eielson AFB, Alaska, for three weeks in November to test the aircraft's braking and anti-skid systems on ice. The tests validated the F-22 braking system's stability and performance as well as the aircraft’s cold-weather operations and maintenance procedures. Tests started with basic ground maneuvering on an icy surface and progressed to high-speed braking tests. Eventually, the tests involved both real and aborted takeoffs and landings under icy runway conditions. Eielson provided the test team the ambient temperatures required to freeze water to create a test surface.