Turkey gets S-400

Defying strenuous  objections and the threat of sanctions from USA, Turkey began receiving the first shipment of a sophisticated Russian surface-to-air missile system S-400 on Friday, a step certain to test the country’s uneasy place in the NATO alliance.

The system, called the S-400, includes advanced radar to detect aircraft and other targets, and the United States has been unyielding in its opposition to Turkey’s acquisition of the equipment, which is deeply troubling to Washington on several levels.

It puts Russian technology inside the territory of a key NATO ally and also a potential threat to stealth intelligence of F-35 . The Russian engineers who will be required to set up the system, American officials fear, will have an opportunity to learn much about the American-made fighter jets that are also part of Turkey’s arsenal.