Vice-President Mike Pence has warned Turkey from the acquisition of Russian anti-aircraft missile systems s-400 " Triumph ". "Donald trump has made it clear that we will not do nothing while our allies buying arms from our opponents," he wrote on Twitter. Penny tried to convince Ankara to choose, " whether it be an important partner in the most successful military Alliance in history, or to risk this partnership, taking such a reckless decision." yesterday, trump has promised to the President of Turkey Recep Tayyip Erdogan to do everything they can to " solve the problem with the F-35 and C-400 ". In addition, the acting Minister of defense Patrick Shanahan expressed hope that Washington will be able to persuade the Turkish partners to purchase the American Patriot defense system instead of s-400. Turkey has many times stated that he will not refuse from plans to buy Russian systems. Ankara will receive the 1st batch of air defense systems in the current year. Erdogan noted that does not hide the rules of operation of s-400 from NATO partners. The President noted that the Turkish side buys "Crimpy" to increase security. However, U.S. policy say that s-400 is incompatible with NATO standards, can be punished for their possible acquisition. For example, this week, the United States ceased to supply the content for the F-35 due to the contract the capital of Russia and Ankara. <span style="color:darkgray