Turkish F-16 warplanes will fly over the country's capital Ankara on Monday to test its new Russian S-400 missile defenses, Turkish media said, despite pressure from Washington for Turkey to drop the system.
Ankara's purchase of the S-400s has been a major factor souring relations with the United States, which says the system is not compatible with NATO defenses and poses a threat to Lockheed Martin's F-35 stealth fighter jets.