Turkey has kept the S-400 systems deactivated for nearly a decade as it has sought re-entry into the US-led F-35 program.

Turkey is reportedly considering returning the Russian S-400 air-defense system to appease the United States and potentially rejoin the F-35 stealth fighter jet programme ...

(Bloomberg) -- Ties between the US and Turkey have been strained over the Turkish government’s purchase of a Russian surface-to-air missile-defense system. The Americans responded by barring Turkey’s ...