Turkish pilots trained at a military air base, "Luke" Arizona fly fighter-bombers F-35, cleaned them, reports Reuters referring to the messenger of the Pentagon. first printed illustrated edition of Foreign Policy wrote that the head of the Pentagon Patrick Shanahan informed his Turkish counterpart Hulusi Akar to that studying in the United States fly F-35 pilots are required to leave the country until July 31. This decision was made on the background of the negotiations the United States and Turkey, which Washington tries to dissuade Ankara from the purchase of Russian anti-aircraft missile system (ADMS) s-400. "The Ministry knows that Turkish pilots do Not fly ", - quotes Agency the words of the official envoy of the Pentagon, Mike Andrews. first leader Recep Tayyip Erdogan once again made the initiative of the American leader is Donald Trump to make a common working group on s-400. Turkey has already said it will not abandon plans to purchase the s-400 and that the first batch of air defense systems expected to arrive in the country in July. The US reports that the s-400 system is incompatible with NATO standards, can be punished for their possible acquisition and has repeatedly said that we have the opportunity to delay or cancel the sales process of new aircraft F-35. Turkey is one of the participants of the international program of the USA on creation of the F-35. Turkey also repeatedly stated that the s-400 is not a danger to the American F-35. <span style="color:darkgray