Erdogan says Russian S-400 operational by April 2020
Turkey's President Recep Tayyip Erdogan said Friday that it planned to start using the Russian S-400 missile defence system - a bone of contention with the United States - in April 2020. "In the coming spring, God willing in April 2020, we will be able to start using this system," he told a gathering of his Justice and Development Party (AKP) in Ankara. Washington has reacted to Turke