Turkey

Turkey was barred from the F-35 program after it decided to purchase the Russian S-400 missile.

The U.S.-backed SDF has begun pulling back and destroying fortifications in northern Syria.

Turkey has been banned from purchasing the F-35 after buying the Russian-made S-400 missile system.

The Trump administration has confirmed that NATO ally Turkey will be removed from the F-35 Joint Strike Fighter program.

Incirlik has played a key role in air operations against the Islamic State in Iraq and Syria.

The Pentagon says it will cost $500 million to $600 million to find new suppliers for F-35 parts produced by Turkey.

Turkey's purchase of the so-called "F-35 killer" has begun despite retaliatory plans to boot it from the jet program.

Turkish Aerospace Industries on Monday unveiled its own next-generation fighter concept.

The U.S. Defense Department has given Turkey one last chance to cancel its planned order of the Russian-made S-400.

Turkey's commitment to acquiring Russia's S-400 anti-air system is unacceptable, Air Force Lt. Gen. Tod Wolters said.