S-400 missile system arrived in Turkey

A Russian transport jet Friday , June 12 brought the first delivery of the $2.2 billion missile system to a Turkish military air base outside Ankara, causing concern from Brussels to Washington.

Washington says the S-400, with its advanced radar that could potentially be used to target NATO jets, threatens to compromise NATO military systems in Turkey. The United States has ruled out delivery of its latest F-35 jet if the Russia missiles are deployed, and Turkish firms face being frozen out of the consortium that is building the F-35.

"We are aware of Turkey taking delivery of the S-400. Our position regarding the F-35 has not changed, and I will speak with my Turkish counterpart Minister Akar this afternoon," Acting U.S. Secretary of Defense Mark Esper told reporters Friday.

U.S. State Department spokesperson Morgan Ortagus warned Tuesday of "real and negative consequences" if the Russian missiles are procured.