The purchase by Turkey of the s-400 is not connected with security of NATO or contracts for the manufacture and delivery of American fighters 5th generation F-35, said the country's leader Recep Tayyip Erdogan. "The reasons why we buy these systems are obvious ", - quotes the words of Erdogan, a television channel TRT. The Turkish leader said that the rules of operation of s-400 Turkish military is not hiding from the partners of the Ankara Alliance. USA has many times spoken out against the acquisition by Turkey of Russian air defense systems s-400. Thus, the Ministry of defense has threatened Ankara with "dire consequences" such as penalties and the deterioration of relations in the sphere of military-technical cooperation. It and among them is about the F-35 fighter jets and anti-aircraft missile complexes Patriot, which the Turkish side hopes to get from the capital of the United States. The United States fear that the Turkish military, the prospect of owning the F-35 and Russian systems s-400, have the opportunity to reveal the possibility of American fighters in front of colleagues from Russia. The head of the European command of US military power Curtis Scaparrotti urged Ankara "to avoid mutual exploitation" of the F-35 and C-400, and the commander of the U.S. air force in the European Union and Africa Todd Walters said about the threat such a "combination" for NATO. According to the consensus, Russia will supply Turkey With four divisions of s-400 to 2, 5 billion. Part of the agreement, Ankara will pay itself for the expense of the Russian loan. The Turkish authorities propose to establish Russian centers in the country by October 2019. Recep Tayyip Erdogan has said that the deal on the s-400 is finished and steps back can not be. Ankara also believes the potential acquisition of Russian s-500. <span style="color:darkgray