US Team to Visit Turkey to 'Express Specific Concerns' Over

US Team to Visit Turkey to 'Express Specific Concerns' Over S-400 Deal - Reports

Washington has been pressuring Ankara to abandon its purchase of Russian S-400 air defence systems for months, promising to sell it the Patriot missile system instead, and threatening to block the delivery of the F-35 fifth-gen fighter jets if Turkey goes forward with its deal with Russia.