Relations the USA and Turkey have soured following the purchase Turkey a Russian missile defense system. Turkey received the first deliveries the Russian-made S-400 missile defense system Friday. The USA had warned Turkey not to buy defense equipment Russia. The USA and Turkey are both allies NATO - a defense organization created in 1949 to counter any possible military aggression by Russia. NATO consists of 29 North American and European nations. The USA has the biggest military the member states. In recent years, Turkey has been establishing closer ties Russia. This has caused security concerns the USA and other NATO member countries.
The U.S. has warned Turkey it will face economic sanctions if it goes ahead and installs the S-400 defense system. It also said Turkey would not be allowed to play any part a program to manufacture the USA's high-tech F-35 fighter jets. The U.S. wants Turkey to buy its Patriot missile defense system instead. U.S. officials argue the Russian system would be incompatible NATO systems and would expose F-35 fighter jets to possible Russian subterfuge. Turkey said the S-400 would not be integrated NATO systems and would not pose a threat to the NATO alliance. Turkey's president said the decision to purchase the S-400 system did not mean it is seeking "alternatives" its relations the West.