Aircraft
F-22 Modernization Plans Progress Despite Hypoxia Issue
The 195th and final F-22 Raptor for the U.S. Air Force was delivered from Lockheed Martin Aeronautics in Marietta, Ga., on May 2. (Photo: Lockheed Martin)
The 195th and final F-22 Raptor for the U.S. Air Force was delivered from Lockheed Martin Aeronautics in Marietta, Ga., on May 2. (Photo: Lockheed Martin)

Now out of production, the Lockheed Martin F-22 Raptor is troubled by an unresolved problem thought to be tied to its onboard oxygen generation system (Obogs). Nevertheless, the U.S. Air Force recently deployed the stealthy fighter to Al Dhafra airbase in the UAE, and it plans to add new capabilities to the aircraft over the next decade.