Washington agreed to "study" the S-400 purchased by Turkey in exchange for the F-35.

Turkish Foreign Minister Mevlut Cavusoglu announced that the United States of America accepted Ankara's offer to study Russian S-400 Triumph systems for their work and NATO threats, in exchange for a revision of the US decision to sell fifth generation F-35 fighters to Turkey ...

“Turkey and the United States of America have begun negotiations to set up a joint working group on US sanctions imposed in connection with Ankara's purchase of Russian S-400 missile defense systems, Foreign Minister Mevlut Cavusoglu said Wednesday. Washington imposed sanctions on the Defense Industry Directorate (SSB), a NATO ally Turkey, its boss Ismail Demir and three other employees this month following the acquisition of the S-400. Speaking at a press conference on Wednesday, Cavusoglu said that US Secretary of State Mike Pompeo has expressed interest in setting up a joint working group (to assess the potential impact of the S-400 on NATO systems - ed.) "- сообщает information agency "Reuters".

Experts note that interference in the operation of the S-400 Triumph complexes produced by Russia can lead to unpredictable consequences, not only for Russia, but also for Turkey, since in the event of a malfunction of protected systems, the complexes may generally be inoperative - if development, Russian designers used various degrees of copy protection.