Combat aircraft being produced in the United States are now overwhelmingly stealth aircraft, while many of China’s fighter jets are also stealth fighter jets. European countries and Russia are still mostly producing 4th-generation fighter jets with some stealthy or low-observable features. More than half of the world’s stealthy combat aircraft are F-35s, with Chinese J-20s and Lockheed Martin F-22s making up much of the remainder of the aircraft.