Get to know the F-35 Lightning II, the most advanced jet fighter in the world. (Photo : BO AMSTRUP/Ritzau Scanpix/AFP via Getty Images)An F-35 fighter jet flies as it returns to Fighter Wing Skrydstrup air base of the Royal Danish Air Force (RDAF) after patrolling around Denmark at low altitude near Skrydstrup, Denmark on October 1, 2023.